title: Twodimensional Thin-Layer Chromatographical Analysis of Drug Extracts with the Help of a New Technical Process. Example of Application: Calendulae flos.
authors.affiliation: Institut für Pharmazeutische Biologie. Philipps-Universität Marburg. D-3550 Marburg, Federal Republic of Germany.
authors.forename: W
authors.initials: W
authors.lastname: Heisig
authors.forename: M
authors.initials: M
authors.lastname: Wichtl