I've been interested in Rhodesian vehicles for many years so was happy to get a copy of ...
"Fighting Vehicles and Weapons of Rhodesia" by Peter G Locke & Peter D Cooke. ISSN-0-473-02413-6 Book lists the publishers address & phone no. in Wellington, NZ. The authors may still be around in NZ too.
White Rhodesia was the most innovative & progressive in armoured vehicle design in the 20th Century. Many ideas have been adopted by the West & East - foremost is the V-shaped lower hull of wheeled vehicles to deflect mine blasts. Others include various guns such as the Spider, a horizontally rotating multi-barrel shotgun mounted on vehicles ranging from an Austin A-40 to Pookie etc and a shot-gun with rotating-chamber.