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Measuring and Monitoring Biological Diversity by W. Ronald Heyer Variation within the Leptodactylus podicipinus-wagneri comple... by W. Ronald Heyer Variation, systematics, and zoogeography of Eleutherodactylus... by W. Ronald Heyer Variation and systematics of frogs of the genus Cycloramphus ... by W. Ronald Heyer Adenomera Lutzi (Amphibian by W. Ronald Heyer Systematics of the Fuscus group of the frog genus Leptodactyl... by W. Ronald Heyer Relationships of the Marmoratus species group (Amphibia, Lept... by W. Ronald Heyer Systematics of the pentadactylus species group of the frog ge... by W. Ronald Heyer Analysis of the intergeneric relationships of the Australian ... by W. Ronald Heyer


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