A nice page for your friends looking to get started in metal detecting
https://www.basementguides.com/metal-detecting/
The Complete Guide to the Best Metal Detectors of 2020
https://www.kellycodetectors.com/pages/the-complete-guide-to-the-best-metal-detectors/
A GUIDE TO METAL DETECTING
https://dragonfiretools.com/a-guide-to-metal-detecting/
The Ultimate Beginner’s Guide to Metal Detecting
https://www.hobbyhelp.com/metal-detecting/
Ultimate Metal Detector Guide for Beginners
https://detectorsdirect.com.au/blogs/detector-articles/the-ultimate-metal-detector-guide-for-beginners-2020
Complete Guide to Cleaning and Preserving All Coins, Tokens & Medals
http://metaldetectingworld.com/cleaning_preservation_coin.shtml
Ground Balancing
https://www.seriousdetecting.com/all-about-ground-balance/
Metal Detector FAQ’s
http://www.metaldetectors.com/metal-detectors/faqsarticle.cfm
How to Select a Metal Detector
http://www.metaldetector.com/learn/buying-guide-articles/getting-started/how-to-select-a-metal-detector
Best Digging Tools
http://www.predatortools.com/
National Historic Preservation Act
http://www.nps.gov/archeology/tools/Laws/NHPA.htm
Antiquities Act
http://www.nps.gov/archeology/tools/Laws/antact.htm
Archeological and Historic Preservation Act (AHPA)
http://www.nps.gov/archeology/tools/Laws/AHPA.htm
Garden State Numismatic Association
http://www.gsna.org/
Historical Marker Database
http://www.hmdb.org