Walter Reed Biosystematics Unit
Fauna of Ixodid Ticks of the World
The Arachnid Order Solifugae
European Scorpions
Zecken in Mitteleuropa
National Pesticide Information Center
Armed Forces Pest Management Board
The World Spider Catalog
Microbiology and Immunology online
List of Prokaryotic Names
International Committee on Taxonomy of Viruses
Zecken.de