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References
1.
Clark, O.W.
, Calco Technical Bulletin No. 546 .
2.
"Kenwood Bulletin Book ," Albany, N. Y. , F. C. Huyck and Sons , 1927 .
3.
"Kenwood Bulletin Book ," Albany, N. Y. , F. C. Huyck and Sons , 1927 , p. 11 .
4.Ibid , p. 30 .
5.Ibid , p. 31 .
6.
Ibid., p. 33.
7.Ibid , p. 34 .
8.
Laurie, K.S.
, Calco Technical Bulletin No. 751 .
