共 30 条
[2]
[Anonymous], 1977, SAMPLING TECHNIQUES
[3]
Cleveland WS, 1994, ELEMENTS GRAPHING DA
[4]
Cochran W.G, 1957, STAT METHODS, V6th ed
[5]
COHN V, 1988, IN PRESS NEWS NUMBER
[6]
COLTON T, 1974, STATISTICS MED
[7]
REPORTING ON METHODS IN CLINICAL-TRIALS
[J].
NEW ENGLAND JOURNAL OF MEDICINE,
1982, 306 (22)
:1332-1337