A13, C90, J20, J24
J31, J32, J33, J64, J81
A13, C90, J20, J24
O12, J24
I21, I25, J24, O15
Making; J13 - Fertility • Family Planning • Child Care • Children • Youth; I20 – Education and Research Institutions - General
J31, J71, J81, C93, L86
; Compensation and Compensation Methods and Their Effects, M54 - Labor Management , J33 - Compensation
I22, I28, J24, C93
A21, D91, I21, J24