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Ehrlich, Paul Ralph, and Lawrence Edmund Gilbert
1973. Population structure and dynamics of the tropical butterfly Heliconius ethilla. Biotropica 5(2): 69 82, 5 figs., 4 tabs. (September) [Trinidad]
Ehrlich, Paul Ralph, Ilkka Hanski and Carol L. Boggs
2004. What have we learned?, pp. 288-300. In: Ehrlich, P. R. & I. Hanski (Eds.), On the wings of checkerspots. A model system for population biology. Oxford, Oxford University Press. ([25 March]) [general]
Ehrlich, Paul Ralph, and Peter Hamilton Raven
1965. Butterflies and plants: a study in coevolution. Evolution 18(4): 586 608, 1 tab. (28 January) [general; host plants; behavior; mimicry; Neotropics]
Ehrlich, Paul Ralph, Helen R. Sparrow, Thomas D. Sisk and Gretchen C. Daily
1994. Notes on butterfly distributions in southern Costa Rica (Lepidoptera: Papilionoidea). Tropical Lepidoptera 5(1): 21-23 ("31 May", [17 June]) [general]
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