Gold Prospectors Association of America (Join now!)
http://www.goldprospectors.org/
https://www.goldprospectors.org/Community/AboutGPAAChapters
(State chapters of the GPAA)
The Prospector’s Club of Southern California (So. Cal. club I belonged to)
The New 49’ers (Northern California club – big on miners rights)
Public Lands for the People (Land & Mining rights)
Western Mining Alliance (Mining rights)
http://WesternMiningAlliance.org
Metal Detector Planet (Metal detecting blog)
https://metaldetectorplanet.com
Kellyco Metal Dectectors Guide to Gold Detecting Machines
https://www.kellycodetectors.com/catalog/pages/the-complete-guide-to-gold-detecting-metal-detectors