共 13 条
[1]
AFSCHRIFT M, 1969, AM REV RESPIR DIS, V100, P147
[3]
COCHRAN WG, 1953, SAMPLING TECHNIQUES, P73
[4]
FISHER R, 1958, STATISTICAL METHODS, P159
[6]
FRY DL, 1959, AM REV RESPIR DIS, V80, P123
[8]
LEUALLEN EC, 1955, AM REV TUBERC PULM, V72, P783