por Pytel, Andrew [autor] | Singer, Ferdinand Leon, 1907- [autor] | Pytel, Andrew. Strength of materials.
por Pytel, Andrew [autor] | Singer, Ferdinand Leon, 1907- [autor] | Gaspar Torrent, Raimundo [traductor] | Gutiérrez Vázquez, Ángel [traductor] | Paniagua Bocanegra, Francisco [traductor].