Spitzka, Edward Anthony. <br/><br/>
Hereditary resemblances in the brains of theree brothers. 

 - Newe York-US :   American Anthropological Association,   1904. 
 - páginas 307-312 :   ilustraciones blanco y negro 
 - Irregular 
 - Vol.6, no.2 (Apr/Jun 1904) 
 - American anthropologist ;   no.2 .
 - American Anthropological Association. .