1. English, 1913.
Mica, its History, Production, and Utilization. London, D. Jaroslaw, 1913.
8°: 86 p., frontispiece (colored), 24 illus.
Very scarce. The text includes chapters on thehistory of use, physical and chemical properties, occurences, production and working, application, production statistics, and consumption. A bibliography and index are included.
Bibliographical references: BL [07107.g.49.]. NUC.
2. German, 1913.
Der Glimmer. Eine monographische Studie. Berlin, Verlag von Jaroslaw's Erste Glimmerwaren-Fabrik, 1913.
8°: 91 p., illus.
Bibliographical references: NUC.