Não informado. (1955). Mathematics Teaching. Association of Teachers of Mathematics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Mathematics Teaching. Derby, Inglaterra: Association of Teachers of Mathematics, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Mathematics Teaching. Association of Teachers of Mathematics, 1955.
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