Midget microprojector for dust determinations

Author: Brown, Carlton E.
Year: 1944
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3780
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3780
Subject: Mines and mineral resources--Dust control--United States
Link: https://hdl.handle.net/2027/mdp.39015078497305

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