共 15 条
[1]
DOWLING MAC, 1966, WHOMAL66535
[4]
GARCIAMARTIN G, PERSONAL COMMUNICATI
[5]
Macdonald G, 1957, EPIDEMIOLOGY CONTROL
[6]
PULL JH, UNPUBLISHED DOCUMENT
[7]
RAGHAVAN K, 1966, B WORLD HEALTH ORGAN, V34, P788
[8]
VARGAS CF, PERSONAL COMMUNICATI
[9]
YEKUTIEL P, 1960, Bull World Health Organ, V22, P669
[10]
1971, WHO467 TECH REP SER