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Interpreting Long-Term Trends in Blue Mountain Ecosystems from Repeat Photography. General Technical Report PNW-GTR-315
- SKOVLIN, Jon M. - THOMAS, Jack Ward. Interpreting Long-Term Trends in Blue Mountain Ecosystems from Repeat Photography. General Technical Report PNW-GTR-315. 1.vyd. Portland : U.S.Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1995. 102 s.: obr.
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