TY  - RPRT
TI  - Historical Statistics for Mineral Commodities in the United States
AU  - Thomas Kelly
AU  - David Buckingham
AU  - Carl A. DiFrancesco
AU  - Kenneth E. Porter
AU  - Thomas G. Goonan
AU  - John L. Sznopek
AU  - Cyrus Berry
AU  - Melissa Crane
PY  - 2001
DO  - 10.3133/ofr20016
UR  - https://pubs.usgs.gov/publication/ofr20016
ID  - ofr20016
ER  -