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References by this author
Olney, P.J.S.; Ellis, P.; Fisken, F.A. 1994. Mammals bred in captivity and multiple generation births in 1992. International Zoo Yearbook 33: 395-396.
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Olney, P.J.S.; Ellis, P. 1994. Census of rare animals in captivity in 1993. International Zoo Yearbook 33: 446.
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Olney, P.J.S.; Ellis, P. 1993. Mammals bred in captivity and multiple generation births in 1991. International Zoo Yearbook 32: 459-460.
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Olney, P.J.S.; Ellis, P. 1993. Census of rare animals in captivity in 1992. International Zoo Yearbook 32: 508.
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Olney, P.J.S.; Ellis, P. 1992. Mammals bred in captivity and multiple generation births in 1990. International Zoo Yearbook 31: 361.
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Olney, P.J.S.; Ellis, P. 1992. Census of rare animals in captivity in 1991. International Zoo Yearbook 31: 408-409.
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Olney, P.J.S.; Ellis, P. 1991. Mammals bred in captivity and multiple generation births in 1988/89. International Zoo Yearbook 30: 470.
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Olney, P.J.S.; Ellis, P. 1991. Census of rare animals in captivity in 1989/90. International Zoo Yearbook 30: 543-544.
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Olney, P.J.S.; Ellis, P. 1990. Mammals bred in captivity and multiple generation births in 1987. International Zoo Yearbook 29: 336.
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Olney, P.J.S.; Ellis, P. 1990. Census of rare animals in captivity in 1988. International Zoo Yearbook 29: 384-385.
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Olney, P.J.S.; Ellis, P. 1989. Census of rare animals in captivity in 1987. International Zoo Yearbook 28: 523-524.
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Olney, P.J.S.; Ellis, P. 1989. Mammals bred in captivity and multiple generation births in 1986. International Zoo Yearbook 28: 475.
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Olney, P.J.S.; Ellis, P.; Sommerfelt, B. 1988. Mammals bred in captivity and multiple generation births in 1985. International Zoo Yearbook 27: 423.
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Olney, P.J.S.; Ellis, P.; Sommerfelt, B. 1988. Census of rare animals in captivity in 1986. International Zoo Yearbook 27: 471-472.
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