Literary sources on Web
Biolinks of the University of Karlsruhe
Missing Link - Versandbuchhandlung Difficulties in getting books from the UK or USA? They will probably be able to help you
Natural History Book Service - Home Page They offer special catalogues on zoology, botany, ecology etc
GBV|| Online Datenbanken Search several libraries in Germany
Systematic Parasitology
The World-Wide Web Virtual Library: Subject Catalogue: Biosciences
The World-Wide Web Virtual Library- Biosciences