Reference Library - Overprints, Moveable Type
| Glazer, M. | Orange Free State Philately, Vol. 1, The Stamps, The Philatelic Society for Greater Southern Africa and OSSEWA Press, Sebring, FL, 2002. Information throughout text. |
| Glazer, M. | Orange Free State Philately, Vol. 1, The Stamps, The Philatelic Society for Greater Southern Africa and OSSEWA Press, Sebring, FL, 2002. Information throughout text. |