St. Paul, MN: North Central Research Station, Forest Service- U.S. Department of Agriculture, 1997. Paperback. 635pp. Quarto [27.5 cm] Illustrated wraps. Very good. The wraps show general light rubbing and scratching. There is a previous owner's name on the top edge of the first page. The pages are very clean. Item #36746
USDA Forest Service General Technical Report NC-190. The first symposium was held in 1987. Much had happened in owl conservation in between the two symposiums.
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