Increasing the efficiency of airphoto forest surveys by better definition of classes
By: [C.Andrew Bickford]
Series: Station paper / Northeastern Forest Experiment Station -- no. 58; Station paper (Northeastern Forest Experiment Station (Radnor, Pa.)) -- no. 58.
Publisher: Northeastern Forest Experiment Station
Published: 1953
Place of publication: Upper Darby, Pa
Language: eng
Subjects: Forest surveys; Aerial photography in forestry
Notes: Cover title.

Includes bibliographical references (p. 9).