Illustrated Pollen Terminology Heidemarie Halbritter, Silvia Ulrich, Friðgeir Grímsson, Martina Weber, Reinhard Zetter, Michael Hesse, Ralf Buchner, Matthias Svojtka, Andrea Frosch-Radivo
Plant Anatomy from the Standpoint of the Development and Functions of the Tissues and Handbook of Micro-technic Unknown author