共 9 条
[2]
CREIGHTON LL, 1991, US NEWS WORLD R 1216, P80
[3]
Hagestad G. O., 1985, HDB AGING HDB AGING, V2nd, P35
[4]
JENDREK MP, 1993, GRANDSPARENT WHO PAR
[6]
SALUTER AF, 1992, CURRENT POPULATION P, V20
[7]
Schulman J., 1982, GOLDEN GATE U L REV, V12, P539
[8]
Seltzer M. M., 1976, TIME ROLES SELF OLD, P111
[9]
*US BUR CENS, 1988, COUNT CIT DAT BOOK 1