por Philippakis, Andreas S [autor] | Sanchez. Juan Manuel [traductor] | Kazmier, Leonard J [autor] | Vaquero, Maria Angeles [traductor] | Philippakis, Andreas S. Advanced cobol.
por Philippakis, Andreas S [autor] | Villamizar Herrera, Jesús [traductor] | Kazmier, L. R [autor] | Philippakis, Andreas S. Structural Cobol.
por Philippakis, Andreas S [autor] | Sisa, Alberto Jaime | Martinez Paez Jose J [traductor] | Kazmier, Leonard J [autor].