Overby, Osmund. <br/><br/>
Activities. 

 - Missouri-US :   University of Missouri-Columbia,   1979. 
 - páginas 1-3 :   ilustraciones blanco y negro 
 - Anual 
 - No.13 (1979) 
 - MUSE. Annual of the Museum of art and archaeology ;   no.13 .
 - University of Missouri-Columbia. .