共 23 条
[2]
BARNARD JL, 1907, 19 U PENNS PUBL
[5]
ECONOMIC-ANALYSIS OF MARITAL INSTABILITY
[J].
JOURNAL OF POLITICAL ECONOMY,
1977, 85 (06)
:1141-1187
[7]
BLOCH F, 1973, 114 STANF U I MATH S
[9]
ENSIGN F, 1969, COMPULSORY SCH ATTEN
[10]
Fogel Robert W., 1974, TIME CROSS EC AM NEG