TY  - RPRT
TI  - Documentation of data format and content to accompany magnetic tape copies of various data files of the National Coal Resources Data System (NCRDS); ECOAL, WCOAL, NEWCOAL, BMALYT, and USCHEM
AU  - M. Devereux Carter
AU  - Antoinette L. Medlin
AU  - Kathleen K. Krohn
PY  - 1981
DO  - 10.3133/ofr811079
UR  - https://pubs.usgs.gov/publication/ofr811079
ID  - ofr811079
ER  -