C93, D83, I10, I31, L82, L86, Z13
C91, D31, I31
J28: Safety • Job Satisfaction • Related Public Polic, J81: Working Conditions, I31: General
D63, H21, I31
C93, K14, K42, I12, I31, J01
I31, J1, J2
D12, D90, I31, L82, Z13
I31, J12, J22
I20, I28, D04
D14, D91, I31, O12, O16, J16