Mallinckrodt Chem. Works
Patent: US2367632 , 1942 ;

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Wallingford; Jones; Homeyer
Journal of the American Chemical Society, 1942 , vol. 64, p. 577
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Mallinckrodt Chem. Works
Patent: US2342385 , 1941 ;

Gagnon et al.
Canadian Journal of Research, Section B: Chemical Sciences, 1950 , vol. 28, p. 207,210

Wallingford; Jones; Homeyer
Journal of the American Chemical Society, 1942 , vol. 64, p. 577