Range seeding in the ponderosa pine zone in Colorado /
by A.C. Hull, Jr., and W.M. Johnson.
- Washington, D.C. : U.S. Dept. of Agriculture, 1955.
- 40 p. : ill., 1 map ; 23 cm.
- Circular / United States Department of Agriculture ; no. 953 .
- Circular (United States. Department of Agriculture) ; no. 953. .