por Ettlin, Walter A [autor] | Rubio Ayuso, Antonio Jose [traductor] | Ettin, Walter A. WordStar 4.0 made easy.
por Ettlin, Walter A [autor] | Sanchez Perz, Juan Manuel [traductor] | Ettlin, Walter A. Wordstar made easy.
por Ettlin, Walter A [autor] | Susanna de la Serna, Alfonso [traductor] | Ettlin, Walter A. WordStar 6.0 made easy.