TY  - BOOK
AU  - Chilingarian, G.V..
TI  - Developments in petroleum science,7:Bitumens,asphalts and tar sands / 
SN  - 0-444-41619-6
U1  - H2235 
PY  - 1985///
CY  - Amsterdam : 
PB  - Elsevier scientific Publishing Campany , 
KW  - Origin of Oil and Gas
ER  -