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- [7] MORPHOGENESIS OF THE YOLK-SAC PLACENTA IN THE BLUE SHARK AMERICAN ZOOLOGIST, 1979, 19 (03): : 947 - 947
- [9] ANNULAR HEMATOMA OF SHREW YOLK-SAC PLACENTA AMERICAN JOURNAL OF ANATOMY, 1978, 152 (01): : 45 - 57