Electronic recorder as aid in aerial insect surveys
By: Richard I. Washburn
Contributors: Intermountain Forest and Range Experiment Station (Ogden, Utah)
Series: Research note / Intermountain Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service -- no. 31; Research note (Intermountain Forest and Range Experiment Station (Ogden, Utah)) -- no. 31.
Publisher: Intermountain Forest and Range Experiment Station
Published: 1956
Place of publication: Ogden, Utah
Language: eng
Subjects: Equipment and supplies; Dictating machines; Aerial surveys in forestry
Notes: Caption title.

"May 1956."