por Markus, John, 1911- [autor] | Polo Velazquez, Alex [traductor] | Markus, John, 1911-. Special circuits ready-reference.
por Markus, John, 1911- [autor] | Alatorre Miguel, Efrén [traductor] | Markus, John, 1911-. Popular circuits ready-reference.
por Markus, John, 1911- [autor] | Markus, John, 1911-. Electronics projects ready-reference.