THE COINAGE AND COUNTERFEITS OF THE ZUID AFRIKAANSCHE REPUBLIEK  by Elias Levine  published by PURNELL
( This is a must read – try to obtain from second hand bookshops )

MONEY IN SOUTH AFRICA  by C.L. Engelbrecht  published by TAFELBERG

ONS GELDERFENIS  deur Matthy Esterhuysen

THE GOLDEN KEY ( A Complete Guide to Gold Coin Investment )  by Eli Levine  published by PURNELL

VALLEY OF GOLD by A.P. Cartwright  published by CITADEL PRESS Cape Town.
( The story of the minting of the Veld pond at Pilgrims Rest )

COIN COLLECTING FOR DUMMIES 2nd Edition  by Neil S. Berman and Ron Guth  published by Wiley Publishing Inc.