1.		The layout of "Strowger" automatic exchanges : Strowger automatic telephones / Automatic Telephone Manufacturing Company Ltd. Data Publicação: 1930
2.		Some maintenance features of "Strowger" automatic telephone systems : Strowger automatic telephones / Automatic Telephone Manufacturing Company Ltd. Data Publicação: 1928
3.		The 32A selector : B.P.O. type 2,000 / Automatic Telephone Manufacturing Company Ltd. Data Publicação: 1936