Trierer FarbenbüchleinIn: De Dietsche warande. Tijdschrift voor kunst en ZedegeschiedenisYear 1891, issue 4S. 165 - 168Hg. von Max KeufferOnline editions:archive.org/details/dedietschewarandens4/page/n185books.google.com/books?id=WMA1G6rf_qYC&pg=PA165hdl.handle.net/2027/uc1.b3006429?urlappend=%3Bseq=185hdl.handle.net/2027/mdp.39015073704911?urlappend=%3Bseq=187LanguagegermanKeywordsDyingPharmacopoeia
