Birgel, E.H. D'Angelino, J.L. Garcia, M. Benesi, F.J. Zogno, M.A. Ocorrencia da infeccao causada pelo virus da leucose bovina no estado de Sao Paulo Occurrence of the enzootic bovine leukosis infection in cattle of the state of Sao Paulo, Brazil Subjects--Topical Terms: BOVINOLEUCOSEINFECCAOSAO PAULO