Wavelength Websites
physicshandbook.com
Online physics handbook, physics dictionary, physics video, physics experiments, physics laws, physics charts and table, physics quiz and much more...
1,951,590 
$ 480.00
copradar.com
Detailed technical description of microwave and laser (lidar) police traffic speed radar. Includes operational limitations, possible operator errors, and common misreadings....
222,902 $ 36,720.00