Κανονική προβολή Προβολή MARC Προβολή ISBD

Meyer, Richard F. 1921-

Definition and world resources of natural bitumens / by Richard F. Meyer and Wallace De Witt. - [Washington]: [United States Government Printing Office], [1990]. - iv, 14 p. : tables ; 28 cm. - 1944 .

Includes bibliographical references (p. 13-14).

Definitions of the main types of natural bitumens, with emphasis on natural asphalt, the most significant quantitatively and economically, and its world distribution.

Subjects--Topical Terms:
Bitumen
Asphalt

Dewey Class. No.: 553.24