Niosh pocket guide to chemical hazards / U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute of Occupational Safety and Health - June 1997 - Cincinnati : NIOSH, 1997 - XL, 440 p. ; 13 x 22 cm - DHHS (NIOSH) Publication 140 . - DHHS publication 1997/140 .