RT Journal Article SR Electronic T1 Clinical experience with the Margulies intrauterine contraceptive device JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 14 OP 20 VO 95 IS 1 A1 F. L. Johnson A1 F. R. Doerffer A1 J. E. Tyson YR 1966 UL http://www.cmaj.ca/content/95/1/14.abstract