1. H. Molisch Der Einfluss einer Pflanze auf die andere: Allelopathie (Jena: Gustav Fischer, 1937), p. 20.
2. E. L. Rice, Allelopathy (New York: Academic Press, 1974), p. 1; ?Allelopathy ? an Update,? Bot. Rev., 45 (1979), 15?109.
3. Recent major reviews, in addition to those by Rice, include A. M. Grodzinskii, Osnovy Khimichnoi Vzaemodii Roslin Kiev: Naukova Dumka, 1973); R. F. Fisher, ?Allelopathic Interference among Plants: I. Ecological Significance,? in Proc. Fourth N. Amer. Forest Biol. Workshop, ed. H. E. Wilcox and A. F. Hamer, (Syracuse: State University of New York, College of Environmental Science and Forestry, 1977), pp. 73?94; S. B. Horsley, ?Allelopathic Interference among Plants: II. Physiological Modes of Action,? ibid., pp. 96?136.
4. J. L. Harper, ?New Biological Books: Allelopathy by E. L. Rice?, Quart. Rev. Biol., 50 (1975), 493?495; Population Biology of Plants (London: Academic Press, 1977), pp. 369?381.
5. N. C. Brady, The Nature and Property of Soils (New York: Macmilan, 1974); J. Turner and P. R. Olson, ?Nitrogen Relations in a Douglas Fir Plantation,? Ann. Bot. (Lond.), 40 (1976), 1185?93.