Search U.S. government technical reports digitized or harvested by TRAIL.
Technique for routine use of the konimeter
Microprojection method for counting impinger dust samples
Petrographic identification at atmospheric dust particles
Bureau of Mines midget impinger
Size of smallest particles determined in impinger dust-counting methods
Investigation of a photoelectric device for the determination of low concentrations of dust
Analyzing midget impinger dust samples with an electronic counter