Mirror stereoscope parallax wedge
By: by H. Gyde Lund.
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research note -- PNW-140.; USDA Forest Service research note PNW -- 140.
Publisher: Pacific Northwest Forest and Range Experiment Station, USDA Forest Service
Published: 1971
Place of publication: Portland, Or
Language: eng
Subjects: Stereoscope.; Photographic interpretation.; Aerial photography in forestry.
Notes: Caption title.

"January 1971."

Includes bibliographical references.