Dust sampling with the Bureau of Mines midget impinger :
using a new hand-operated pump /
by J.B. Littlefield and H.H. Schrenk.

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Main Author: Littlefield, J. B.
Related Names: Schrenk, H. H. (Helmuth Herman), 1902-
Language(s): English
Published: [Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1938.
Subjects: Mineral dusts > Mineral dusts / Sampling.
Physical Description: 4 p. : ill. ; 27 cm.
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