NUMBER SCALE FOR ILLUSTRATING ALL FOUR FUNDAMENTAL...

NUMBER SCALE FOR ILLUSTRATING ALL FOUR FUNDAMENTAL PROCESSES WITH DIRECTED NUMBERS

Ethel L. Grove, Ewart L. Grove, Charles E. Scott
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Volume:
51
Year:
1951
Language:
english
Pages:
5
DOI:
10.1111/j.1949-8594.1951.tb06718.x
File:
PDF, 153 KB
english, 1951
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