Montiel, X., Carruyo, I., Ferrer, J., Marcano, L., Mármol, Z. and Páez, G. 1. Production of β-D-galactosidase from Kluyveromyces fragilis in batch cultures with cheese whey as substrate. Rev. Téc. Fac. Ing. Univ. Zulia. 23, 2 (1).