Ultrastructure of the Vaginal Tissue of Rabbits Treated With Collagen Sponge Alone and Medicated with Zinc and Copper Salts and Copper Wire**Supported in part by a contract from the Program for Applied Research on Fertility Regulation, Northwestern University (PARFR-85N) under Prime Contract AID/csd-3608; and a grant from Medi-Coll, Inc., Phoenix, Ariz.

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