Gravimetric mass respirable dust sampling :
metal and nonmetal mining industry /
by Staff, Audio Visual Office-Education and Training.
APA Citation
United States. Mining Enforcement and Safety Administration. (1977). Gravimetric mass respirable dust sampling: metal and nonmetal mining industry. [Washington]: U. S. Dept. of the Interior, Mining Enforcement and Safety Administration.
MLA Citation
United States. Mining Enforcement and Safety Administration. Gravimetric Mass Respirable Dust Sampling: Metal And Nonmetal Mining Industry. [Washington]: U. S. Dept. of the Interior, Mining Enforcement and Safety Administration, 1977.
Warning: These citations may not always be complete (especially for serials).