| Citation | Sacher, G.A. and E.F. Staffeldt, 1974 Relation of gestation time to brain weight for placental mammals: implications for the theory of vertebrate growth. The American Naturalist 108(963):593-615. |
| Ref. | 97866 Sacher, G.A. and E.F. Staffeldt, 1974 |
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| Named Used as Valid | Balaenoptera physalus |
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