BARRETT VINCENT  VINCENT BARRETT,  GREGORY  LASSITER , DAVID  WILCOCK,  DOYLE  BAKER , AND  CRAWFORD. <br/><br/>
ANIMAL  TRACTION IN EASTERN UPPER VOLTA:  A TECHNICAL ,ECONOMIC AND INSTITUTIONAL ANALYSIS: 

 - MICHGAN,  MICHGAN  STATE  UNIVERSITY:  1982. 
<br/><br/><label>Dewey Class. No.: </label>636   BAR