Ory, Steven J. (1987). Extrauterine Pregnancy AlvinLangerLeslieIffyExtrauterine Pregnancy1986PSG Publishing CompanyLittleton, Massachusetts351with illus, $35
.
MAYO CLINIC PROCEEDINGS, 62(6), 539. 10.1016/s0025-6196(12)65492-5
Ory, Steven J. (1987). Extrauterine Pregnancy AlvinLangerLeslieIffyExtrauterine Pregnancy1986PSG Publishing CompanyLittleton, Massachusetts351with illus, $35
. MAYO CLINIC PROCEEDINGS, 62(6), 539. 10.1016/s0025-6196(12)65492-5