Van Rooy, D. J., South Africa
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Vol 32, No 7-8 (1965) - Original Research
Wiskunde in Suid-Afrika*
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Vol 23, No 4 (1956) - Original Research
Beskrywing en verklaaring in die Natuurwetenskap
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Vol 17, No 4 (1950) - Original Research
,,Rubbi-Lesings oor Wiskunde."
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Vol 20, No 1 (1952) - Original Research
Die heelal en sy onstaan
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Vol 20, No 2 (1952) - Original Research
Die heelal en sy onstaan (II)
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