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A humidity regulator


Author:
Clark, W. Mansfield, United States Bureau of Animal Industry, and United States Department of Agriculture
Source:
Circular (United States. Bureau of Animal Industry) ; no. 211 1913
Year:
1913
Subject:
Humidity -- Control
Format:
6 pages : illustrations ; 24 cm.
Publisher:
U.S. Dept. of Agriculture, Bureau of Animal Industry
Collection:
Organic Roots Collection