Hall Opperman books & textbook
Birds of the Willamette Valley Region (Regional Bird Books)
Harry Nehls Tom Aversa Hall Opperman Hal Opperman map by Shawn Morse Drawings by Eric Kraig map by Shawn Morse Drawings by Eric Kraig
R. W. Morse Company /2004-08-18 Paperback / 400 Pages
isbn-10: 0964081040 / isbn-13: 9780964081048
