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Hamlett, W C; Wourms, J P; Hudson, J S (1985) Ultrastructure of the full-term shark yolk sac placenta. I. Morphology and cellular transport at the fetal attachment site. J Ultrastruct Res 91:192-206 |
Hamlett, W C; Wourms, J P; Hudson, J S (1985) Ultrastructure of the full-term shark yolk sac placenta. II. The smooth, proximal segment. J Ultrastruct Res 91:207-20 |