Methods and Vegetation Classification
SYNOPSIS OF METHODS USED TO MAP HISTORICAL VEGETATION IN OREGON AND WASHINGTON, BASED ON GENERAL LAND OFFICE SURVEY NOTES.
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John A. Christy, Oregon Biodiversity Information Center, Institute for Natural Resources, Portland State University and Edward R. Alverson, The Nature Conservancy of Oregon. December 2011.
CLASSIFICATION OF HISTORICAL VEGETATION IN OREGON AND WASHINGTON, AS RECORDED BY GENERAL LAND OFFICE SURVEYORS
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John A. Christy, Edward R. Alverson, Molly P. Dougherty, Susan C. Kolar, Clifford W. Alton, Susan M. Hawes, Gene Hickman, Jennifer A. Hiebler, Eric M. Nielsen. Oregon Biodiversity Information Center, Institute for Natural Resources, Portland State University. November 2016.