Modifications of the U.S.F.S. Model 52A fire line trencher
By: by Robert R. Lindahl and David B. Kibler
Contributors: Kibler, David B.; United States. Forest Service
Series: Technical equipment report -- no. F-4; Technical equipment report (United States. Forest Service) -- no. F-4.
Publisher: U.S. Dept. of Agriculture, Forest Service
Published: 1959
Place of publication: Washington, D.C
Language: eng
Subjects: Forest fires; Trenching machinery; Equipment and supplies; Evaluation; Prevention and control
Notes: Cover title.

"April 1959."