TY  - RPRT
TI  - Chemistry and mineralogy of natural bitumens and heavy oils and their reservoir rocks from the United States, Canada, Trinidad and Tobago, and Venezuela
AU  - John W. Hosterman
AU  - R. F. Meyer
AU  - C.A. Palmer
AU  - M. W. Doughten
AU  - D.E. Anders
PY  - 1990
DO  - 10.3133/cir1047
UR  - https://pubs.usgs.gov/publication/cir1047
ID  - cir1047
ER  -