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[文献書誌] Fujihara,N.and Koga,O.: "Physiological differences in membrane function between cryopreserved chickens and turkey spermatozoa" Cryobiology. 28. 573-574 (1991)
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[文献書誌] Fujihara,N.and Koga,O.: "Physiological functions of the dorsal proctodeal gland foam of the male quail" Proceedings of World Quail Conference. 1. 79-83 (1991)
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[文献書誌] Jujihara,N.and Koga,O.: "The accessory reproductive fluids in the domestic male birds" Journal of Cellular Biochemistiry. 15E. 203 (1991)
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[文献書誌] Fujihara,N.: "Advances in Reproductive Biology" Academia Sinica,Beijing,China, (1991)