Horton, J. W. (1997). Forum on Geologic Mapping Applications in the Washington-Baltimore Urban Area. US Geological Survey circular 1148.
Chicago Style CitationHorton, J. W. "Forum On Geologic Mapping Applications in the Washington-Baltimore Urban Area." US Geological Survey Circular 1148 1997.
MLA CitationHorton, J. W. "Forum On Geologic Mapping Applications in the Washington-Baltimore Urban Area." US Geological Survey Circular 1148 1997.
Warning: These citations may not always be 100% accurate.