Abraham, Herbert. <br/><br/>
Asphalts and allied substances :   Their occurrence, modes of production, uses in the arts and methods of testing 

 - 5th. 
 - Toronto :   Van Nostrand,   1948. 
<br/><br/>Tomo I: Raw materials and manufactured products;Tomo II: Methods of testing: Bibliography and references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ASFALTO<br/>PETROLEO<br/>PAVIMENTOS
<br/><br/><label>Universal Decimal Class. No.: </label>691.16