C93, D12, G10, M41
O33, Q12,Q16
J28: Safety • Job Satisfaction • Related Public Polic, J81: Working Conditions, I31: General
I24, J16, J24, C93, D83
D63, H21, I31
Q23, Q54, Q57, O13, D72, Q58
O12, D91, G41
C83, D31, D63
C83, C99, D01, D91, J15, J16, J64, O57
C93, J24, J01, O12