J15, J16, J46, J81
J16, J24, J81, C93
I21,J24,M54
D90, J00, M52
J21, J33
C92, D82, D83, M52, C72
M12, M54, J24, L84
D24, L23, L84, M11, M54, O31
C93, D91, J24, J63, M54
J28: Safety • Job Satisfaction • Related Public Polic, J81: Working Conditions, I31: General