Mac's pack
Employee suggestion submitted by Llewellyn J. McDowell, Jr. of the Salem District offers a possible solution to the long standing problem of carrying survey stakes and other field equipment. Customize a carrying pack out of old automobile inner tubes. Includes sketch of basic design
紙書籍, English, 1969
U.S. Department of the Interior, Bureau of Land Management, Portland Service Center, Portland, Or., 1969