Gygax, A. F. Moderne Chemigraphie in Theorie und Praxis / A.F. Gygax. - Frankfurt am Main : Polygraph Verlag, 1957. - 580 s., [2] k. tabl. kolor. : il. ; 30 cm. Indeks. Subjects--Topical Terms: Chemigrafia. Universal Decimal Class. No.: 655.1/.3