GURPS Ultra-Tech
Author(s): David L. Pulver, Kenneth Peters
Edition: 3.3 Published: 2016 Publisher: Steve Jackson Games, Incorporated Format: Paperback
ISBN 13: 9781556348105
ISBN 10: 155634810X
ARRL's Tech Q & A
Author(s): ARRL Inc Published: 2018 Publisher: ARRL Inc Format: Paperback
ISBN 13: 9781625950864
ISBN 10: 1625950861