. . "Collection in Special Collections & Archives Research Center, Oregon State University Libraries."@en . . "Donald B. Zobel Collection of Historic Forestry and Vegetation Maps, 1914-1989 (MAPS ZobelMaps)"@en . . "2015-06-18"^^ . "2015-07-16"^^ . "2015-06-18"^^ . "2015-07-16"^^ .