TY  - BOOK
AU  - Vander Zijpp, A J  .
AU  - Sybesma ,W  .
TI  - Improving genetic disease resistance in farm animals / 
SN  - 0  7923  0518  3
U1  - 636.0896 
PY  - 1988///
CY  - London : 
PB  - Kluwer Academic Publishers , 
N1  - Vol.  52
ER  -