Other
Adfc Allgemeiner Deutscher Fahrrad Club E. V.: Bicycling
Site in German. The German Cycling Club offers much information in German about cycling in Germany, including tours, routes, brochures, and links to cycling clubs, tours, and equipment.
Other
Rathaus: Measuring Radiation
Guides the reader through the origins of some of the units of radiactivity measurement, including the curie, the rad, and the becquerel.
Idaho State University
Idaho State University: Radiation Measurement
A brief introduction to units of radiation measurement.