TY  - BOOK
TI  - Optima: A Quarterly Review 
AV  - HC 517 .S7 1953 V.3 No.2 
PY  - 1953///
CY  - Johannesburg: 
PB  - Anglo American Corp. of South Africa, 
KW  - Industries -- Africa, Southern -- Periodicals.
KW  - Science -- South Africa.
KW  - South Africa
ER  -