Dirscherl; Thron Justus Liebigs Annalen der Chemie, 1933 , vol. 504, p. 297,302 Full Text Show Details Drosdow Zhurnal Obshchei Khimii, 1938 , vol. 8, p. 937,941 Chem. Zentralbl., 1939 , vol. 110, # I p. 4326