TY  - RPRT
TI  - Geochemical survey of the western coal regions; first annual progress report, July 1974
AU  - Jon J. Connor
AU  - Ronald R. Tidball
AU  - James A. Erdman
AU  - Richard J. Ebens
AU  - John R. Keith
AU  - Barbara M. Anderson
PY  - 1974
DO  - 10.3133/ofr74250
UR  - https://pubs.usgs.gov/publication/ofr74250
ID  - ofr74250
ER  -