Authors: Nabarro, F.R.N.,Anderson, J.C., Mavrocordatos, C.E.; Zinsser R.G.F..

Superior Title: South African Journal of Science, Nov 1959, Vol 55, Issue 4, p. 108-112.

Availability: https://hdl.handle.net/10520/AJA00382353_532

Authors: Bleksley, A.E.H.. Anderson, J.C., Swart H.J.

Superior Title: South African Journal of Science, Nov 1958, Vol 54, Issue 10, p. 277-280.

Availability: https://hdl.handle.net/10520/AJA00382353_579