TY  - RPRT
TI  - GEONAMES data base of geologic names of the United States through 1988 : OH, IN , IL, WI, MI
AU  - G. W. Luttrell
AU  - M.L. Hubert
AU  - C.R. Murdock
PY  - 1990
DO  - 10.3133/ofr90466f
UR  - https://pubs.usgs.gov/publication/ofr90466F
ID  - ofr90466F
ER  -