Booth, A. D. (1965). Automatic digital calculators (3rd ed.). Butterworth.
Dyfyniad Arddull ChicagoBooth, Andrew D. Automatic Digital Calculators. 3rd ed. London: Butterworth, 1965.
Dyfyniad MLABooth, Andrew D. Automatic Digital Calculators. 3rd ed. Butterworth, 1965.
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