D90, E24, J16, J31, J71, M50
H53 (Government Expenditures and Welfare Programs) D91 (Role and Effects of Psychological
C99, D11, D81, D91
D83, L86, L82, O10
D11 · D81 · D83 · D87
C99; D69; D91; J15
I12
D90, H10, H40, H83, L31, L33
I21, I24, I25
C90, D64, D91