Rex chains and sprockets.   "A Catalg and Application Book for  Chain Drives and Conveying Equipment...".  Catalog Nº 444 ;  

 - Milwaukee, Wisconsin, U.S.A. :   Chain Belt Company,   December 1, 1939. 
 - 768 p. :   diagram.  foto.  ilus.  
<br/><br/><label>Subjects--Index Terms: </label>CADENAS DE TRANSMISIÓN ENGRANAJES 
<br/><br/><label>Index Terms--Genre/Form: </label><br/>CATÁLOGO