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by Raven, Peter H.; Hassenzahl, David M.; Berg, Linda R.
by Bildtgard, Torbjorn; Öberg, Peter
by Bildtgård, Torbjörn; Öberg, Peter
by Raven, Peter H.; Hassenzahl, David M.; Hager, Mary Catherine; et al.
by Schofer, Peter; Rice, Donald; Berg, William
by Raven, Peter H.; Berg, Linda R.
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); George B. Johnson (Washington University)
by Edited by Martha Wolff; Martha Wolff, Susan Frances Jones, Richard G. Mann, andJudith Berg Sobré; With contributions by Ilse Hecht, Peter Klein, Cynthia KuniejBerry, and Larry Silver
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl (University of Nevada, Las Vegas )