por Freund, John E [autor] | Williams, Frank Jefferson [autor] | Castaño Ceballos, Jesús María [traductor] | Freund, John E. Elementary business statistics.
por George, Claude S [autor].
por Glass, Gene V, 1940- [autor] | Stanley, Julian C [autor] | Galves Gómez, Elsa [traductor] | Guzmán, Eugenia [traductor] | Glass, Gene V, 1940-. Statistical methods in education and psychology.
por Cueli, José, 1934- [autor] | Biro, Carlos E, 1932- [autor].