Grounding and Bonding for the Radio Amateur (H. Ward Silver, N0AX)
https://www.arrl.org/shop/Grounding-and-Bonding-for-the-Radio-Amateur/
ARRL Antenna Book (23rd Ed.)
https://www.arrl.org/shop/ARRL-Antenna-Book-23rd-Softcover-Edition/
Propagation and Radio Science: Exploring the Magic of Wireless Communication
http://www.arrl.org/shop/Propagation-and-Radio-Science
