TY  - SER
AU  - Avila,F.A.
AU  - Avila,S.H.P.
AU  - Iturrino,R.P.S.
AU  - Quintana,J.L.
TI  - Evaluation of the immunizing efficiency of a Pili K99 - Bearing vaccine for the protection of cattle against colibacillosis
KW  - VACA LEITEIRA
KW  - COLIBACILOSE
KW  - IMUNIZACAO
KW  - VACINA
ER  -