Book Review: Hagers Handbuch der Pharmazeutischen Praxis für Apotheker, Arzneimittelhersteller, Ärzte und Medizinalbeamte. 1. Bd. Allg. Teil. Wirkstoffgruppen I (Hager's Handbook of Pharmaceutical Practice for Druggists. Drug Manufacturers, Physicians, and Medical Officials. Vol. 1, General Part. Groups of Active Materials I). Edited by P. H. List and L. Hörhammer in collaboration with H. J. Roth and W. Schmid