共 26 条
[1]
ARMITAGE P, 1971, STATISTICAL METHODS, P387
[3]
GOLDSTEIN H, 1962, SIGHT SAVING REV, V32, P84
[4]
GRAHAM PA, 1968, BRIT J PREV SOC MED, V22, P238
[5]
HADDAD HM, 1967, 6TH P ANN C MOD REP, P19
[7]
HATFIELD EM, 1966, NATIONAL SOC PREVENT, P66
[8]
JOSEPHSON E, 1964, 3RD P ANN C MOD REP, P45
[9]
KAHN HA, 1973, NIH73427 US DEP HEW, P120