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by Hassenzahl, David M.; Hager, Mary Catherine; Gift, Nancy Y.; et al.
by Raven, Peter H.; Hassenzahl, David M.; Berg, Linda R.
by Raven, Peter H.; Hassenzahl, David M.; Hager, Mary Catherine; et al.
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 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 )
by Peter H. Raven (Missouri Botanical Garden); Linda R. Berg (St. Petersburg Junior College); David M. Hassenzahl (Chatham University)