参考文献
Coffin; Maass
Canadian Journal of Research, 1930 , vol. 3, p. 526
Chem. Zentralbl., 1931 , vol. 102, # I p. 2430
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Coffin; Sutherland; Maass
Canadian Journal of Research, 1930 , vol. 2, p. 267,272
Chem. Zentralbl., 1930 , vol. 101, # II p. 2250