1.		English Electric. Switchboard instruments moving coil type square flush mouting pattern Data: [s.d.]
2.		English Electric. Switchboard instruments moving iron round flush and projecting pattern Data: [s.d.]
3.		English Electric. Iron-Cored type wattmeters and varmeters : Electro and Dynamometer Data: [s.d.]
4.		Alucrom. L´antirouille universel servant de couché de base Data: [s.d.]