American Institute of Electrical Engineers, Transactions of the
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 1 > 139 - 145
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1299 - 1309
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1531 - 1534
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1207 - 1218