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file D (Stack)Newton, Robert R.
"The Sources of Eratosthenes' Measurement of the Earth" [and] "Comments on 'Was Ptolemy a Fraud?' by Owen Gingerich"
photocopy from the Quarterly Journal of the Royal Astronomical Society, vol. 21 no. 4, 1980, pp. 379-387 and 388-399.
[1981-56]
1980