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- Robert L. Anderson (USDA Forest Service, www.forestryimages.org);
188
- Ronald F. Billings (Texas Forest Service, www.forestryimages.org);
45, 149
- Bob Cain (USDA Forest Service, Rocky Mountain Region); 190
- Clemson University (USDA Cooperative Extension Slide Services, www.forestryimages.org);
44
- Conklin, David A.; 2, 15, 37, 191, 194-195, 198, 202, 204, 218-224,
230-235, 238, 240-252, 254-257, 261, 263, 295
- Whitney Cranshaw (Colorado State University, www.forestryimages.org);
61-62
- Tom DeGomez (University of Arizona, Cooperative Extension); Cover-1,133
- Jerald E. Dewey (USDA Forest Service, www.forestryimages.org);
13, 24, 26, 46, 80
- Brian Geils (USDA Forest Service, Rocky Mountain Research Station);
228-229
- John H. Ghent (USDA Forest Service, www.forestryimages.org);
274
- Kennenth E. Gibson (USDA Forest Service, www.forestryimages.org);
83c, 104, 122
- Thomas E. Hinds (USDA Forest Service, Rocky Mountain Research Station);
176, 210-211, 216, 225
- Edward Holsten (USDA Forest Service, www.forestryimages.org);
50, 57, 170
- Gerald J. Lenhard (Louisiana State University, www.forestryimages.org);
43
- R. Ladd Livingston (Idaho Department of Lands); 83a, 117, 150
- Ann Lynch (USDA Forest Service, Rocky Mountain Research Station);
41
- David McComb (USDA Forest Service, www.forestryimages.org);
5
- Roy Morales (USDA Forest Service, Carson NF); 49
- Minnesota DNR (Minnesota Department of Natural Resources Archives,
www.forestryimages.org);
51
- Donald Owen (California Department of Forestry and Fire Protection,
www.forestryimages.org);
130
- Jeff Schalau (University of Arizona, Cooperative Extension); 92
- John Schwant (USDA Forest Service, www.forestryimages.org);
189
- Borys Tkacz (USDA Forest Service, Washington Office); cover-2, 174,
178, 183-184, 275, 284, 294
- Scott Tunnock (USDA Forest Service, www.forestryimages.org);
76-77, 144
- Michael R. Wagner (Northern Arizona University); Cover-3, 20-21, 23,
25, 27-28, 30-32, 48, 75, 78, 151-157, 161, 164
- USDA Forest Service files; 72, 102
- USDA Forest Service, Intermountain Region Archives (www.forestryimages.org);
3, 10, 162
- USDA Forest Service, Northern Region; 83b (R1-03-08)
- USDA Forest Service, Rocky Mountain Region Archives (www.forestryimages.org);
4, 7, 8, 11, 29, 52, 105, 107, 127
- USDA Forest Service, Southwestern Region; Cover, 1, 3-4, 6, 9, 14,
16-19, 33-36, 38-40, 42, 47, 53-56, 58-60, 63-71, 73-74, 79, 81-82,
84-91, 93-101, 103, 106, 108-116b, 118-121, 123-126, 128-129, 131-132,
134-143, 145-148, 158-160, 163, 165-169, 171-173, 175, 177, 179-182,
185-187, 192-193, 196-197, 199-201, 203, 205-209, 212-215, 217, 226-227,
236-237, 253, 258-260, 262, 264-273, 276-283, 285-293, 296-302
- Detlev Vogler, USDA Forest Service, Pacific Southwest Research Station;
239
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