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Speroff Leon Darney P D, . (2001). A clinical guide for contraception. Philadelphia: Lippincott W&W.
Speroff Leon Darney P D, . 2001. A clinical guide for contraception. Philadelphia: Lippincott W&W.
Speroff Leon Darney P D, . A clinical guide for contraception. Philadelphia: Lippincott W&W. 2001.