TY  - RPRT
TI  - Geologic map of the Richardson quadrangle, Lawrence and Johnson Counties, Kentucky
AU  - J. D. Sanchez
AU  - Donald Clayton Alvord
AU  - Philip Thayer Hayes
PY  - 1978
DO  - 10.3133/gq1460
UR  - https://pubs.usgs.gov/publication/gq1460
ID  - gq1460
ER  -