Measuring angles with a carpenter's folding ruler
By: M. Martinelli, Jr., and R.A. Schmidt, Jr.
Contributors: Schmidt, R. A.; Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Series: Research note RM -- 152.
Publisher: Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1969
Place of publication: Fort Collins, Colo
Language: eng
Subjects: Rulers (Instruments); Measuring instruments
Notes: Caption title.