Eyman, Frances. <br/><br/>
An unusual winnebago war club and an american water monster. 

 - Pennsilvania-US :   Univesity of Pennsylvania,   1963. 
 - páginas 31-36 :   ilustraciones blanco y negro 
 - Trimenstral 
 - Vol.5, no 4(1963)  
 - Expedition. the bulletin of the university museum of the university of pennsilvania ;   no. 4 .
 - University of Pennsylvania. .