共 10 条
[1]
BEASLEY WBR, 1967, AM J OBSTET GYNECOL, V98, P201
[2]
CUMMINS GTM, 1965, TRAINING NURSE MIDWI, P451
[5]
Kaul S J, 1969, Pak J Fam Plann, V3, P75
[6]
OSTERGARD DR, IN PRESS
[8]
WEISBUCH JB, 1970, PUBLIC HEALTH REP, V85, P707, DOI 10.2307/4593945
[9]
YANG JM, 1968, STUD FAMILY PLANN, P4
[10]
1971, REPORTS SECRETARY HE