TY  - RPRT
TI  - Cobalt
AU  - John F. Slack
AU  - Bryn E. Kimball
AU  - Kim B. Shedd
PY  - 2017
DO  - 10.3133/pp1802f
UR  - https://pubs.usgs.gov/publication/pp1802F
ID  - pp1802F
ER  -