20404163
9781147736991
Packer, George Nichols is the author of 'Our Calendar: The Julian Calendar and Its Errors. How Corrected by the Gregorian. Rules for Finding the Dominical Letter, and the Day of the Week of Any ... Our Lord Four Thousand, a New and Easy Met', published 2010 under ISBN 9781147736991 and ISBN 1147736995.
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