TY  - RPRT
TI  - Germanium and uranium in coalified wood from upper Devonian black shale
AU  - Irving A. Breger
AU  - J. M. Schopf
PY  - 1955
DO  - 10.1016/0016-7037(55)90038-7
UR  - https://pubs.usgs.gov/publication/70010747
ID  - 70010747
ER  -