TY  - RPRT
TI  - Unconventional energy resources: 2007-2008 review
AU  - Peter D. Warwick
AU  - American Association of Petroleum Geologists, Energy Minerals Division
PY  - 2009
DO  - 10.1007/s11053-009-9094-0
UR  - https://pubs.usgs.gov/publication/70035038
ID  - 70035038
ER  -