. Alaska forest research : biennial report for 1956-1957. Forests and forestry Alaska. Figure cutting of Porcupine River caused by flooding waters. The dis- lodged white spruce end up down the river on gravel bars serving as breeding material for Ips Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Alaska Forest Research Center (U. S. ). Juneau, Alaska : Alaska Forest Research Center, U. S. Dept. of A

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. Alaska forest research : biennial report for 1956-1957. Forests and forestry Alaska. Figure cutting of Porcupine River caused by flooding waters. The dis- lodged white spruce end up down the river on gravel bars serving as breeding material for Ips Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Alaska Forest Research Center (U. S. ). Juneau, Alaska : Alaska Forest Research Center, U. S. Dept. of Agriculture, Forest Service

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Photo credit: © Library Book Collection / Alamy / Afripics
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber18