American Institute of Electrical Engineers, Transactions of the
Transactions of the American Institute of Electrical Engineers > 1941 > 60 > 3 > 105 - 108
Transactions of the American Institute of Electrical Engineers > 1941 > 60 > 4 > 181 - 184
Transactions of the American Institute of Electrical Engineers > 1941 > 60 > 12 > 1090 - 1096