Encyclopedia of plant physiology : new series / Pirson, A. Zimmermann, Martin Huldrych, Ruhland, W. Plant physiology. 581 SPR 1975 A063 Or. Earlier ed. issued in 1955-1967 by W. Ruhland under title: Handbuch der Pflanzenphysiologie. Berlin ; New York : Springer-Verlag, 1975- 1975- Text v. in :