On information on blue sulphide dyes

[1] HALLER, 1930, TEXTILCHEMIKER COLOR, V11, P33

[2] HAUSER H, 1928, THESIS ZURICH, P59

[3] LANGE O, 1925, SCHWEFELFARBSTOFFE, P39

[4] ZUNKER B, Z ANGEW CH, V32, P48

[5] Z FARB TEXT, V4, P214

[6] 1913, FARBERZTG, P479

[7] 1918, CH Z, V42, P260

[8] 1914, FARBERZTG, P361

[9] 1908, CH ZTG, V32, P956

[10] 1906, CHEM IND, P295

[1] HALLER, 1930, TEXTILCHEMIKER COLOR, V11, P33

[2] HAUSER H, 1928, THESIS ZURICH, P59

[3] LANGE O, 1925, SCHWEFELFARBSTOFFE, P39

[4] ZUNKER B, Z ANGEW CH, V32, P48

[5] Z FARB TEXT, V4, P214

[6] 1913, FARBERZTG, P479

[7] 1918, CH Z, V42, P260

[8] 1914, FARBERZTG, P361

[9] 1908, CH ZTG, V32, P956

[10] 1906, CHEM IND, P295