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[文献書誌] Takahashi,Hisashi: "Clutch size and egg size variations in salamanders:Traits of the variations in some levels of biological organization" Current Herpetology in East Asia(The Herpetological Society of Japan). 282-291 (1989)
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[文献書誌] Hasumi,Masato: "Seasonal changes in body shape and mass in the salamander,Hynobius nigrescens" Journal of Herpetology. 24. 113-118 (1990)
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[文献書誌] Hasumi,Masato: "Seasonal dynamics of reproductive organs in male salamanders of the species Hynobius nigrescens" Copeia. 1990. 363-373 (1990)
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[文献書誌] Yamashita,Kaoru: "Effects of thyrotropin,thyroxine,and thiourea on Hynobius nigrescens larvae at low temperature" Science Reports of Miigata University,Series D(Biology). 27. (1990)