J28: Safety • Job Satisfaction • Related Public Polic, J81: Working Conditions, I31: General
I10, I12, I18, D83, D91
D63, H21, I31
I31, J1, J2
F22, J13, Z10
J13; J24; O15
J16, J12, Z13, D81, O15
K37, O15, D63, C9
C93, D9, I12, I2
J12, J61, R23, C93, O18