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SOME SOUTH AFRICAN STEREUMS
Published in Transactions of the Royal Society of South Africa, in 1922, in volume 10, issue 1, pages 151-157
ON HYALITE
Published in Transactions of the Royal Society of South Africa, in 1922, in volume 10, issue 1, pages 239-244
SESUTO AND SECHWANA PRAISES
Published in Transactions of the Royal Society of South Africa, in 1922, in volume 10, issue 1, pages 253-266