simple and inexpensive pulsing device for data-recording cameras
By: David L. Sonderman.
Contributors: Northeastern Forest Experiment Station (Radnor, Pa.); United States. Forest Service.
Series: Research note NE -- 183.; Research note NE -- 183.
Publisher: U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station
Published: 1973
Place of publication: Upper Darby, Pa
Language: eng
Subjects: Lumber -- Measurement -- Equipment, supplies, etc; Photography, Industrial
Notes: Caption title.

Includes bibliographical references (p. 4).