Using the economic surplus model to measure potential returns to int ernational livestock research :   the case of trypanosomosis vaccine r esearch/  
P. Kristjanson ...[et al.]. 
 - Nairobi, kenya :   ILRI Publishing ,   1999 
 - vi, 30p. :    ill., col., maps ;    25 cm. 
 - ILRI Impact assessment series ;   no. 4 .
<br/><br/>Includes bibliographical references (p.28-30) 
<br/><br/><label>ISBN: </label>9291460540 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Livestock productivity--------<br/>Trypanosomiasis--------<br/>Trypanosomiasis in animals--------<br/>Vaccination of animals--------