共 26 条
[21]
TOKUHATA GK, 1973, J CHRON DIS, V25, P163
[23]
YANKAUER A, 1953, AJPH, V43, P1001
[24]
1981, LEADERS ALERT B, V30
[25]
1979, DHEW PHS7955071 PUBL
[26]
1983, BARRIERS EARLY PRENA