Mathematics 1537 in science

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^ grun, bernard (1991). timetables of history (3rd ed.). new york: simon & schuster. p. 239. isbn 0-671-74919-6. 
^ notes on history of math teaching , math books . retrieved 2012-01-26. 
^ richeson, a. w. (may 1947). first arithmetic printed in english . isis. 37 (1/2): 47–56. doi:10.1086/347968. jstor 226161. 






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