TY  - RPRT
TI  - Contributions to economic geology, 1905 : Asphalt
AU  - J. A. Taff
AU  - C. D. Smith
PY  - 1906
DO  - 10.3133/b285h
UR  - https://pubs.usgs.gov/publication/b285H
ID  - b285H
ER  -