TY  - RPRT
TI  - Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part C - Disk (Wordstar; 1.2 mb)
AU  - Donley S. Collins
AU  - Robert R. Cobban
AU  - Eugene E. Foord
AU  - Jack A. Murphy
PY  - 1989
DO  - 10.3133/ofr89206c
UR  - https://pubs.usgs.gov/publication/ofr89206C
ID  - ofr89206C
ER  -