@book{ Solr-10755144, title = {Land use/land cover and environmental photointerpretation keys}, series = {U.S. Geological Survey bulletin ;}, author = {Loelkes, George L.}, editor = {Geological Survey (U.S.)}, address = {Reston, Va. : Alexandria, Va.}, publisher = {United States Department of the Interior, Geological Survey ;}, year = {1983}, pages = {142}, note = {Title from title screen (viewed Nov. 2, 2015).}, url = {http://purl.fdlp.gov/GPO/gpo62485} }