1 microfiche : negative, illustrations ; 11 x 15 cm
Notes
Includes bibliographical references
Microreproduction of original published: [Rockville, Md.]Dept. of Health, Education and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, 1979
Original issued in series: DHEW publication ; no. (NIOSH) 79-127