TY  - RPRT
TI  - Reports and maps of the Geological Survey released only in the open files, 1962
AU  - Betsy A. Weld
AU  - Erwin S. Asselstine
AU  - Arthur Johnson
PY  - 1963
DO  - 10.3133/cir473
UR  - https://pubs.usgs.gov/publication/cir473
ID  - cir473
ER  -