@techreport{circref1720,
title = {Climatography of the United States},
booktitle = {Monthly Normals of Temperature, Precipitation, and Heating and Cooling Degree Days 1971-2000},
author = {United States. Environmental Data Service.},
institution = {National Climatic Data Center},
year = {2002},
address = {Asheville, North Carolina},
url = {http://gcmd.nasa.gov/KeywordSearch/Home.do?Portal=GCMD&MetadataType=0},
keywords = {Climate, Environment, United States}
}