The Dyeing of wool including wool-printing : with the dyestuffs of Leopold Cassella & Co., G.m.b.H., Frankfort o. M. : American branch, Cassella Color Company, New York (1905)
Leopold Cassella & Co, Cassella Color Company · Frankfort o. M. : L. Cassella & Co. · leaf 7
RUSSIAN ANILINE COLOUR WORKS LEOPOLD CASSELLA & C5, RIGA. Works at Riga.
Dyes and dyeing · Woolen and worsted finishing · Textile printing · Hats
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.