TY  - RPRT
TI  - Geologic map of the Blackey quadrangle, Letcher and Knott Counties, Kentucky
AU  - Henry A. Waldrop
PY  - 1976
DO  - 10.3133/gq1322
UR  - https://pubs.usgs.gov/publication/gq1322
ID  - gq1322
ER  -