共 5 条
[1]
Duncan Otis Dudley., 1968, UNDERSTANDING POVERT, P85
[4]
KITAGAWA EM, 1964, DEMOGRAPHY, V1, P296, DOI 10.2307/2060055
[5]
SCHOEN R, 1970, DEMOGRAPHY, V7, P317, DOI 10.2307/2060150