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Typ Titel Autor
Biblio Foreign birds for cage and aviary. By Arthur G. Butler Erich Willems
Biblio The marbled crayfish (Decapoda: Cambaridae) represents an independent new species Erich Willems
Biblio Die Rückseite des Spiegels; Versuch einer Naturgeschichte menschlichen Erkennens Erich Willems
Biblio Running-wheel activity and body composition in golden hamsters (Mesocricetus auratus) Erich Willems
Biblio The story of Plakat Thai III (Expansion) Erich Willems
Biblio Das sogenannte Böse; Zur Naturgeschichte der Aggression Erich Willems
Biblio NATURAL SELECTION ON COLOR PATTERNS IN POECILIA RETICULATA Erich Willems
Biblio The influence of bedding depth on behaviour in golden hamsters (Mesocricetus auratus) Erich Willems
Biblio The emu : official organ of the Australasian Ornithologists' Union. Erich Willems
Biblio So kam der Mensch auf den Hund Erich Willems
Seite Macropodus oligolepis <maybe Synonym> Erich Willems
Biblio The emu : official organ of the Australasian Ornithologists' Union. 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 Checklist of CITES Species Erich Willems
Biblio Large-scale habitat selection by parrots in New Caledonia Erich Willems
Biblio Proceedings of the United States National Museum. Erich Willems
Biblio Bulletin of the British Museum (Natural History). Historical. Erich Willems
Biblio Nest site selection by mohua and yellow‐crowned parakeets in beech forest in Fiordland, New Zealand Erich Willems
Teich Tagesprotokoll 11.04.09 Erich Willems
Biblio Die Vögel; Handbuch der systematischen Ornithologie, von Anton Reichenow ... Erich Willems
Biblio Mutton birds and other birds / H. Guthrie-Smith. Erich Willems
Tierbestand Rein Wildfarbige Wellensittiche Rückzuchtform (id4173) Erich Willems
Biblio Bulletin of the British Ornithologists' Club. Erich Willems
Biblio Checklist of CITES Species and Annotated CITES Appendices and Reservations Erich Willems
Biblio How to sex cage birds (British and foreign), Erich Willems
Wissenschaft ist der Glaube an die Unwissenheit der Experten. {Richard Feynman}