Definition and world resources of natural bitumens /
Meyer, R. F.(Richard F.),1921-
De Witt, Wallace,1920-
Geological Survey (U.S.)
[Reston, Va.?] : Dept. of the Interior, U.S. Geological Survey, ; Denver, CO : For sale by the Books and Open-File Reports Section,
1990.
Shipping list no.: 90-571-P.
Includes bibliographical references (p. 13-14).
Bitumen.
Asphalt.