TY  - RPRT
TI  - Petroleum geology and resources of the Volga-Ural province, U.S.S.R.
AU  - James A. Peterson
AU  - James W. Clarke
PY  - 1983
DO  - 10.3133/cir885
UR  - https://pubs.usgs.gov/publication/cir885
ID  - cir885
ER  -