A humidity regulator - NALDC

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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