American Institute of Electrical Engineers, Transactions of the
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1480 - 1487
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1625 - 1636
Transactions of the American Institute of Electrical Engineers > 1950 > 69 > 2 > 1169 - 1175