Campbell Scientific, Inc.

Web: http://www.campbellsci.com
Contact: James Bilskie, Ph.D.
Bus: (435) 750-9580
E-mail: jim@campbellsci.com

Durham Geo-Enterprises, Inc.

Web: http://www.durhamgeo.com
Contact: Gary N. Durham, Ph.D., P.E.
Bus: (770) 465-7557
E-mail: GDurham@durhamgeo.com

GeoTDR

Web: http://www.gci2000.com
Contact: Kevin M. O'Connor, Ph.D.
Bus: (614) 895-1400
E-mail: koconnor@gci2000.com

Soil Moisture Equipment Corp.

Web: http://www.soilmoisture.com
Contact: Whitney Skaling, President
Bus: (805) 964-3525 Ext 242
Fax: (805) 683-2189
Cell: (805) 680-8218
Email: whit@soilmoisture.com