American Institute of Electrical Engineers, Transactions of the
Transactions of the American Institute of Electrical Engineers > 1935 > 54 > 9 > 970 - 976
Transactions of the American Institute of Electrical Engineers > 1935 > 54 > 9 > 931 - 934
Transactions of the American Institute of Electrical Engineers > 1935 > 54 > 9 > 923 - 930