Bitumen.

Asphalts and allied substances Abraham, Herbert 1960 Asphalts and allied substances Abraham, Herbert 1960 Asphalts and allied substances Abraham, Herbert 1960 Bitumens, asphalts, and tar sands G. V. Chilingarian and T. F. Yen (Editors) 1978 Oil sands, heavy oil & bitumen Banerjee, Dwijen K. 2012 The properties of asphaltic bitumen Pfeiffer, Johan Philip 1950