Abraham, H. (1963). Asphalts and allied substances: Their occurrence, modes of production, uses in the arts, and methods of testing (6th ed.). Van Nostrand.

Abraham, Herbert. Asphalts and Allied Substances: Their Occurrence, Modes of Production, Uses in the Arts, and Methods of Testing. 6th ed. Princeton, N.J.: Van Nostrand, 1963.

Abraham, Herbert. Asphalts and Allied Substances: Their Occurrence, Modes of Production, Uses in the Arts, and Methods of Testing. 6th ed. Van Nostrand, 1963.