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Williams, Jennifer J., Douglas A. Stow and Lincoln Pierson Brower
2007. The influence of forest fragmentation on the location of overwintering monarch butterflies in central Mexico. Journal of the Lepidopterists' Society 61(2): 90-104, 4 figs., 5 tabs. (20 August) [Danaus plexippus (Linnaeus); migration]
Williams, Kathy S., and Lawrence Edmund Gilbert
1981. Insects as selective agents on plant vegetative morphology: egg mimicry reduces egg laying by butterflies. Science 212(4493): 467-469, 2 figs. (24 April) [Heliconius cydno Doubleday; Costa Rica]
Williams, Paul H.
1991. See Vane-Wright, R. I. et al., 1991.
Williams, Robert
2004. Treasures of the forgotten forest. Lavenham, The Wildlife Art Gallery. 168 pp., figs. [general; Ecuador, Peru; diversity; conservation]
Williams, Roger N.
1967. See Monroe, R. S. et al., 1967.
2007. See Inclán, D. J. et al., 2007.
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