Cutter, A., & Mc Shane, R. (1998). The Trachten berg speed system of basic mathematics. Rupa & Co., Calcutta.
Chicago Edition CitationCutter, Ann, and Rudolph Mc Shane. The Trachten Berg Speed System of Basic Mathematics. Rupa & Co., Calcutta, 1998.
MLA Edition CitationCutter, Ann, and Rudolph Mc Shane. The Trachten Berg Speed System of Basic Mathematics. Rupa & Co., Calcutta, 1998.
Warning: These citations may not always be 100% accurate.