Gross static lifting capacity of logging balloons
By: by Ward W. Carson and Penn A. Peters.
Contributors: Peters, Penn A.
Series: USDA Forest Service research note PNW -- 152.
Publisher: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
Published: 1971
Place of publication: Portland, Ore
Language: eng
Number of pages: 17
Subjects: Logging, Aerial.; Balloons.
Notes: Caption title.

"June 1971."