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1. Mine ventilation.

Creator Personal:
Harrington, D. (Daniel), 1878-
Title:
Mine ventilation.
Call Number:
P19469
Date:
1939
Description:

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7047 (1939:Jan.).

Subject Topical:
Mine ventilation., Mine dusts., Air--Purification.
All:
Mine ventilation., Mine dusts., Air--Purification.