共 6 条
[1]
*CTR DIS CONTR, 1979, 1970 1975 SURG STER
[2]
*CTR DIS CONTR, 1980, 1970 1975 SURG STER
[4]
*NATL CTR HLTH STA, 1970, VIT HLTH STAT 2, V39
[5]
PLACEK PJ, 1980, PUBLIC HEALTH REP, V95, P540
[6]
PLACEK PJ, 1977, MONTHLY VITAL STATIS, V26, P1