Lynch, Thomas F. <br/><br/>
More about earth-shaking equipment. 

 - New York:US :   American museum of natural history,   1968. 
 - páginas 507-509 :   ilustraciones blanco y negro 
 - Irregular 
 - Vol. 33, no. 4 (Oct. 1968) 
 - American Antiquity. Separata ;   no. 4 .
 - American museum of natural history. .
<br/><br/><br/>Art¡culo en: Ingles.