共 5 条
[1]
Cochran W., 2005, SAMPLING TECHNIQUES
[2]
GODAMBE VP, 1955, J ROY STAT SOC B, V17, P269
[4]
SIMON HA, 1955, BIOMETRIKA, V42, P425
[5]
SIMON HA, 1958, AM EC REV, V48, P602