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| Chemists -- South Africa (1) |
| Juritz, C. F. (Charles Frederick), 1864-1945 (1) |
| Van der Riet, Berthault de St. Jean, 1867-1952 -- Miscelanea (1) |
| Chemists -- South Africa (1) |
| Juritz, C. F. (Charles Frederick), 1864-1945 (1) |
| Van der Riet, Berthault de St. Jean, 1867-1952 -- Miscelanea (1) |