Roth, Vincent. <br/><br/>
Journal of the progress and activities of the British guiana museum and zoo for quarter ending 30th september, 1961 with incorporated notes of anthropological, historical and zoological interest. 

 - Washington-US :   Royal agricultural & commercial society,   1961. 
 - páginas 15-34 
 - Irregular 
 - No.31 (Sep. 1961) 
 - Journal of The British guiana museum and zoo of the Royal Agricultural & Commercial society ;   no.31 .
 - Royal agricultural & commercial society. .