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[1]HelveticaChimicaActa,1921,vol.4,p.633
[1]HelveticaChimicaActa,1921,vol.4,p.640
[2]HelveticaChimicaActa,1921,vol.4,p.640
[3]HelveticaChimicaActa,1921,vol.4,p.640
[4]HelveticaChimicaActa,1921,vol.4,p.640
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[2]JournaloftheChemicalSociety,1927,p.1937,1942
[3]Patent:DE131400, Fortschr.Teerfarbenfabr.Verw.Industriezweige,vol.6,p.553
[1]ChemischeBerichte,1901,vol.34,p.1856 ChemischesZentralblatt,1902,vol.73,p.1343
[2]Patent:DE131400, Fortschr.Teerfarbenfabr.Verw.Industriezweige,vol.6,p.553