共 11 条
[1]
CHEN C, 1974, 8TH WORLD C FERT STE
[2]
COUREY NG, IN PRESS
[3]
PEARL R., 1932, HUMAN BIOL, V4, P363
[4]
LENGTH OF THE OBSERVATION PERIOD AS A FACTOR AFFECTING THE CONTRACEPTIVE FAILURE RATE
[J].
MILBANK MEMORIAL FUND QUARTERLY-HEALTH AND SOCIETY,
1960, 38 (02)
:140-152
[6]
Shepard M K, 1974, Obstet Gynecol Surv, V29, P739, DOI 10.1097/00006254-197411000-00001
[8]
PERSON YEARS CONCEPT IN EPIDEMIOLOGY AND DEMOGRAPHY
[J].
MILBANK MEMORIAL FUND QUARTERLY-HEALTH AND SOCIETY,
1966, 44 (01)
:69-91
[9]
TIETZE C, 1974, Clinical Obstetrics and Gynecology, V17, P121, DOI 10.1097/00003081-197403000-00012