TY  - RPRT
TI  - An organic origin for the carbonate concretions of the Ohio Shale
AU  - R.E. Criss
AU  - G.A. Cooke
AU  - S.D. Day
PY  - 1988
DO  - 10.3133/b1836
UR  - https://pubs.usgs.gov/publication/b1836
ID  - b1836
ER  -