Scheffer, V. B. (1958). Seals, sea lions, and walruses, a review of the pinnipedia.
シカゴスタイル引用形Scheffer, Victor B. Seals, Sea Lions, and Walruses, a Review of the Pinnipedia. 1958.
MLA引用形式Scheffer, Victor B. Seals, Sea Lions, and Walruses, a Review of the Pinnipedia. 1958.
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