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Binoculars with mil scale as a training aid for estimating form class

Informally Refereed

Abstract

In an extensive forest inventory, estimates involving personal judgment cannot be eliminated. However, every means should be taken to keep these estimates to a minimum and to provide on-the-job training that is adequate for obtaining the best estimates possible.

Citation

Camp, J.R., H.W.; Bickford, C.A. 1949. Binoculars with mil scale as a training aid for estimating form class. Station Paper NE-32. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 11 p.
https://www.fs.usda.gov/research/treesearch/13320