Interpretive techniques, devices and methods for the BLM field use
Series: Technical note / U.S. Bureau of Land Management -- 164; Technical note (U.S. Bureau of Land Management) -- 164.
Publisher: U.S Bureau of Land Management, Portland Service Center
Published: 1972
Place of publication: Portland, Or
Language: eng
Subjects: National parks and reserves; Interpretive programs
Notes: "February 24, 1972."

Bibliography: p. 7.