TY  - RPRT
TI  - Munsell color value as related to organic carbon in Devonian shale of the Appalachian Basin
AU  - John W. Hosterman
AU  - Sallie I. Whitlow
PY  - 1980
DO  - 10.3133/ofr80660
UR  - https://pubs.usgs.gov/publication/ofr80660
ID  - ofr80660
ER  -