共 5 条
[1]
DOWNIE AW, 1961, B WORLD HEALTH ORGAN, V25, P55
[2]
SARKAR JK, 1969, INDIAN J MED RES, V57, P8
[3]
SARKAR JK, 1967, INDIAN J MED RES, V55, P13
[4]
SARKAR JK, 1967, INDIAN J MED RES, V55, P1143
[5]
1970, 23 WEEKL EPID REC, P249