The slotted-templet method for controlling maps made from aerial photographs /
[by Harry T. Kelsh].
- Washington, D.C. : U.S. Dept. of Agriculture, 1940.
- 30 p. : ill., 1 map ; 23 cm.
- Miscellaneous publication / United States Department of Agriculture ; no. 404 .
- Miscellaneous publication (United States. Department of Agriculture) ; no. 404. .
Caption title. Contribution from Soil Conservation Service.