TY  - BOOK
AU  - Kristjanson, P.
TI  - Using the economic surplus model to measure potential returns to int ernational livestock research : : the case of trypanosomosis vaccine r esearch/ 
SN  - 9291460540
PY  - 1999///
CY  - Nairobi, kenya : 
PB  - ILRI Publishing , 
KW  - Livestock productivity
KW  - Trypanosomiasis
KW  - Trypanosomiasis in animals
KW  - Vaccination of animals
N1  -  Includes bibliographical references (p.28-30)
ER  -