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Typ Titel Autor
Biblio Checklist of birds listed in the CITES appendices Erich Willems
Biblio Deutsche tierärztliche Wochenschrift Erich Willems
Biblio Das Leben im Wasser und das Aquarium Erich Willems
Biblio Checklist of CITES Species: a reference to the appendices to the Convention on International Trade in Endangered Species of Wild Fauna and Flora Erich Willems
Biblio The Production of Communication Signals at the Air–Water and Water–Substrate Boundaries Erich Willems
Biblio Habitual tool use innovated by free-living New Zealand kea Erich Willems
Biblio Molecular Data from the Cytochrome b for the Phylogeny of Channidae (Channa sp.) in Malysia Erich Willems
Biblio SEXUAL AND PARTHENOGENETIC POPULATIONS OF THE FRESHWATER SNAIL MELANOIDES TUBERCULATA IN ISRAEL Erich Willems
Biblio Schriften der Naturforschenden gesellschaft in Danzig. Erich Willems
Biblio Checklist of birds listed in the CITES appendices Erich Willems
Biblio Experimental evidence of dispersal of invasive cyprinid eggs inside migratory waterfowl Erich Willems
Biblio Postfledging dispersal of red‐fronted parakeets ( Cyanoramphus novaezelandiae ) from a fenced mainland sanctuary Erich Willems
Biblio Reproductive Success of Hand-Reared vs. Parent-Reared Cockatiels (Nymphicus hollandicus) Erich Willems
Biblio Zu Aktivität und Verhalten von drei Taxa der Zwerghamster der Gattung Phodopus Miller, 1910 Erich Willems
Biblio Checklist of CITES Species: a reference to the appendices to the Convention on International Trade in Endangered Species of Wild Fauna and Flora Erich Willems
Biblio Temperature Tolerance of Red-Rim Melania Melanoides tuberculatus, an Exotic Aquatic Snail Established in the United States Erich Willems
Biblio Checklist of CITES Species Erich Willems
Biblio Australische Sittiche; Haltung, Zucht, Artenschutz Erich Willems
Biblio Morphological differentiation among isolated populationsof dwarf snakehead fish, Channa gachua (Hamilton, 1822)using truss network analysis Erich Willems
Biblio Die Reptilien, Amphibien, Fische und wirbellosen Thiere Erich Willems
Biblio Social facilitation of wound healing Erich Willems
Biblio Heimatjahrbuch 1983: Die Ahr und ihre Hochwässer in alten Quellen Erich Willems
Biblio Nest sites of sympatric orange-fronted (Cyanoramphus malherbi) and yellow-crowned parakeets (C. auriceps) Erich Willems
Biblio Significance of population genetics for managing small natural and reintroduced populations in New Zealand Erich Willems
Biblio Checklist of CITES Species: a reference to the appendices to the Convention on International Trade in Endangered Species of Wild Fauna and Flora Erich Willems
Wo die Fahne in der Hand, da ist der Verstand in der Hose