共 18 条
[1]
ALVEY W, 1979, P SECT SURV RES METH, P275
[2]
[Anonymous], 1977, JAMA, V237, P2385
[3]
[Anonymous], 1979, JAMA, V242, P2562
[4]
[Anonymous], 1976, Prev Med, V5, P207
[5]
[Anonymous], 1982, JAMA, V248, P1465
[10]
DELBENE L, 1982, P AM STAT ASSOC, P292