U.S. Department of Health and Human Services (HHS), U.S. Public Health Service (PHS), Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH),
HETA 92-0306-2465: 1-17
1994,
Singh SP, Rai S, Rai AK, Tiwari SP, Singh SS, Samarketu, Abraham J