TY  - RPRT
TI  - Index of the National Atlas of the United States of America (1970)
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1978
DO  - 10.3133/ofr78604
UR  - https://pubs.usgs.gov/publication/ofr78604
ID  - ofr78604
ER  -