Castration of young pigs /
Asnbrook, Frank G
Castration of young pigs / Frank G. Ashbrook - Washington : Department of Agriculture - 6 p. - EUA. Dept. of Agriculture Farmer's bull.; 780 .
203537
Ganado porcino -- Castración
Castration of young pigs / Frank G. Ashbrook - Washington : Department of Agriculture - 6 p. - EUA. Dept. of Agriculture Farmer's bull.; 780 .
203537
Ganado porcino -- Castración
