Cement Test Equipment, Inc. (Popularity: )

Manufacturers of API/ISO oil well cement testing instruments. Equipment includes consistometers and ultrasonic cement analyzers ...
Category: Science\Technology\Materials\Testing

Arizona-Rockshop (Popularity: )

Sales and pictures of agate, jasper, obsidian, thundereggs, petrified wood and fire opal.
Category: Science\Earth Sciences\Geology\Rocks and Minerals

The American Association of Amateur Astronomers (Popularity: )

News, FAQ, activities, newsletter, store, introductory astronomy kit, programs, and resources located in Dallas, Texas.
Category: Science\Astronomy\Amateur\Organizations

The AstroMax Online Astronomy Catalog (Popularity: )

A service of the American Association of Amateur Astronomers, offering a select line of products ...
Category: Science\Astronomy\Business\Telescopes, Binoculars and Accessories