Swallowtail butterflies: an Action Plan for their conservation.
Gland: IUCN, 1991. Quarto, colour plates, other illustrations, softcover. More
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Swallowtail butterflies of the Americas: a study in biological dynamics, ecological diversity, biosystematics, and conservation.
Gainesville: Scientific Publishers, 1994. Quarto, colour photographs, tipped in a printed note signed by all three authors for Tim New, a fine copy in dustwrapper. More
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