TY  - BOOK
AU  - Chilingarian G V Ed.
AU  -  Yen T F Ed.
TI  - Bitumers, asphalts and tar sands
T2  - Developments in petroleum science; 7
U1  - H1140, L8 
PY  - 1978///
CY  - Asmterdam
PB  - Elsevier Scientific Publishing Company      
KW  -  Carbon minerals
KW  - Geology
ER  -