Electrophoretic techniques in the haemoglobin polimorphism study in cattle, raised in São Paulo state - Brazil - Ayres, Maria Consuelo Caribé; Birgel, Eduardo Harry; Birgel Júnior, Eduardo Harry; Della Libera, Alice Maria Melville Paiva; Mirandola, Regina Mieko Sakata; Biojone, Fernanda de Souza Meirelles (Congreso Mundial de Buiatria, 2000)