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Freeman, H. (1988). Proceedings of the Fifth International Snow Leopard Symposium. India: International Snow Leopard Trust and Wildlife Institute of India.
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Freeman, H. (1979). Phantom cat. Puget Soundings, , 8–13.
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Freeman, H. (1980). Breeding and behavior of the snow leopard.
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Wharton, D., & Freeman, H. (1988). The Snow Leopard in North America: Captive Breeding Under the Species Survival PLan. In H.Freeman (Ed.), (pp. 131–136). India: International Snow Leoaprd Trust and WIldlife Institute of India.
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Jizeng, D., Ji-peng, J., Chang-xin, Z., & Freeman, H. (1994). Opening Remarks to Seventh International Snow Leopard Symposium. In J.L.Fox, & D.Jizeng (Eds.),. Usa: Islt.
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Hunter, D. O., Jackson, R., Freeman, H., & Hillard, D. (1994). Project snow leopard: a model for conserving central Asia biodiversity. In J.Fox, & D.Jizeng (Eds.), (pp. 247–252). Usa: International Snow Leopard Trust.
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Freeman, H. (1996). What's Happening in Mongolia (Vol. xiv). Seattle: Islt.
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Freeman, H., Jackson, R., Hillard, R., & Hunter, D. O. (1994). Project Snow Leopard: a multinational program spearheaded by the International Snow Leopard Trust. In J.L.Fox, & D. Jizeng (Eds.), (pp. 241–245). Usa: Islt.
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Freeman, H. (1990). The view from here: permit hunting of snow leopards. Snow Line, (Winter), 2–3.
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Freeman, H. (1988). Introduction to the Fifth International Snow Leopard Symposium. In H.Freeman (Ed.), (ix). International Snow Leopard Trust and Wildlife Institute of India.
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Freeman, H. (1988). Resolutions Conservation of Snow Leopard, Fifth International Snow Leopard Symposium. (pp. 267–269). Usa.
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Freeman, H. (1978). Social Behavior in the Snow Leopards and its implications for captive management. Int.Ped.Book of Snow Leopards, 1, 71–77.
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Freeman, H. (1983). Behavior in adult pairs of captive snow leopards (Panthera uncia). Zoo Biology, 2(1), 1–22.
Abstract: Eight adult pairs of snow leopards (Panthera uncia) were observed for one to three years in the months December through March to determine the species' social and reproductive characteristics in captivity. To statistically examine the occurrence of behaviors as a function of estrus, the observation weeks were divided into three time blocks: before estrus, estrus, and after estrus. Using percentage of scan samples as an estimate of time spent in various behaviors, 16 behaviors and combined behavior categories were examined for (1) behaviors that differentiated successfully from unsuccessfully breeding pairs, (2) sex differences in behavior, (3) significant correlations between pair members, and (4) behaviors that showed time block effects. The rationale for identifying a behavioral profile of successful breeders in snow leopards was to aid zoos in their captive management programs by increasing their knowledge of the social behavior of this species. By finding correlates to breeding success, informed decisions on whether to change partners after a certain period of time, how to group the cats, and the optimum strategy for a survival plan can be made. (PsycINFO Database Record (c) 2000 APA, all rights reserved
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Freeman, H. (1980). Snow leopard: a cooperative study between zoos. In L. Blomqvist (Ed.), International Pedigree Book of Snow Leopards (Vol. 2, pp. 127–136). Helsinki: Helsinki Zoo.
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Freeman, H. (1980). The snow leopard, today and yesterday. In L. Blomqvist (Ed.), International Pedigree Book of Snow Leopards, Vol. 2 (Vol. 2, pp. 37–43). Helsinki: Helsinki Zoo.
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Freeman, H. (1982). Characteristics of the social behavior in the snow leopard. In L. Blomqvist (Ed.), International Pedigree Book of Snow Leopards, Vol. 3 (Vol. 3, pp. 117–120). Helsinki: Helsinki Zoo.
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O'Connor, T., & Freeman, H. (1982). Maternal behavior and behavioral development in the captive snow leopard (Panthera uncia). In L. Blomqvist (Ed.), International Pedigree Book of Snow Leopards, Vol. 3 (Vol. 3, pp. 103–110). Helsinki: Helsinki Zoo.
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Fox, J. L., & Freeman, H. (1984). An Internationally cooperative fiels study of the snow leopard in Northern India. In L.Blomqvist (Ed.), (Vol. 4, pp. 39–42). Helsinki, Finland: Leif Blomqvist and Helsinki Zoo.
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Freeman, H. (1974). A preliminary study of the behaviour of captive snow leopards (Panthera uncia). In International Zoo Yearbook (Vol. 15, pp. 217–222).
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Freeman, H., Braden, K. (1977). Zoo location as a factopr in the reproductive behavior of captive snow leopards, Uncia uncia. Zoological Garten J.F., 47(3/4), 280–288.
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Freeman, H., & Hutchins, M. (1978). Captive Management of Snow Leopard Cubs. Der Zoologischer Garten, 48, 49–62.
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