Progress in Old World palaeoethnobotany : a retrospective on the ocasion of 20 years of the International Work Group for Palaeethnobotany / edited by Willem van Zeist, Krystyna Wasylikowa & Karl-Ernst Behre ; with the assistance of Geertje Entjes-Nieborg. - Zeist, Willem van; Wasylikowa, Krystyna; Behre, Karl-Ernst (Balkema, 1991)