The essentials of contraceptive technology : a hand book for clinic staff Robert A. Hatcher, Ward Rinehart, Richard Blackburn, Judith S. Geller and James D. Shelton. - London : John Hopkins University, 1997. - xii, 120 p. : ill, : 23 cm. include index. ISBN: 1885960018 LC Class. No.: RG136 / .E87 1997