共 5 条
[1]
BEARE A. S., 1962, MONTHLY BULL MIN HEALTH AND PUBL HEALTH LAB SERV, V21, P167
[2]
BRADSTREET C. M. PATRICIA, 1962, MONTH BULL MIN HEALTH AND PUBL HEALTH LAB SERV, V21, P96
[4]
MCDONALD JC, 1962, BMJ-BRIT MED J, P1036
[5]
PRZESMYCKI F, 1959, Bull World Health Organ, V20, P333