Abraham, H. (1948). Asphalts and allied substances: Their occurrence, modes of production, uses in the arts and methods of testing (5th.). Van Nostrand.
Cita Chicago Style (17a ed.)Abraham, Herbert. Asphalts and Allied Substances: Their Occurrence, Modes of Production, Uses in the Arts and Methods of Testing. 5th. Toronto: Van Nostrand, 1948.
Cita MLA (8a ed.)Abraham, Herbert. Asphalts and Allied Substances: Their Occurrence, Modes of Production, Uses in the Arts and Methods of Testing. 5th. Van Nostrand, 1948.
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