Bell Telephon Labor.
Patent: US2330107 , 1940 ;

Biggs; Bishop
Journal of the American Chemical Society, 1941 , vol. 63, p. 944
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Bell Telephon Labor.
Patent: US2330107 , 1940 ;

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Bell Telephon Labor.
Patent: US2277033 , 1940 ;

Bell Telephon Labor.
Patent: US2330107 , 1940 ;

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Bell Telephon Labor.
Patent: US2277033 , 1940 ;

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Bell Telephon Labor.
Patent: US2322273 , 1940 ;

Aesa, Mohammed C.; Baan, Gabor; Novak, Lajos; Szantay, Csaba
Synthetic Communications, 1996 , vol. 26, # 5 p. 909 - 914