TY  - BOOK
AU  - Burkill,G.C.C.
AU  - Giusti,L.E.
AU  - Giusti,L.E.
ED  - Maraven
ED  - Petróleos de Venezuela, PDVSA
ED  - World Petroleum Congress (11th. : 1983 : London)
ED  - Maraven
ED  - Petróleos de Venezuela, PDVSA
TI  - The Orinoco heavy oil belt
U1  - 060-665.5 W938 1983 
ER  -