por Edwards, David, 1949- [autor].
por Edwards, C. H. (Charles Henry), 1937- [autor] | Penney, David E [autor] | Calvis, David [colaborador] | Iriarte Vivar-balderrama, Rafael [traductor].
por Edwards, C. H. (Charles Henry), 1937- [autor] | Penny, David E [autor] | Pérez Castillo, Habacuc [traductor] | Edwards, C. H. (Charles Henry), 1937-. Elementary differential equations with applications.
por Edwards, C. H. (Charles Henry), 1937- [autor] | Penney, David E [autor] | Palmas Velasco, Óscar Alfredo [traductor].