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Author:Helfenstein

2 matching references were found.

Karrer, P.; Helfenstein; Pieper; Wettstein, A., Helv. Chim. Acta, 1931, 14, 435. [all data]

Karrer; Helfenstein; Widmer, Helv. Chim. Acta, 1928, 11, 1201. [all data]