System der Zeitrechnung in chronologischen Tabellen

Gregorian reform of the calendar : proceedings of the Vatican conference to commemorate its 400th anniversary, 1582-1982 / edited by G.V. Coyne, M.A. Hoskin and O. Pedersen.

The improvement of the Gregorian calendar,.

Alexander Philip

The calendar of luminaris : (Jewish-Christian-Muslim) for 150 years : the Jewish year "Litzira" 5660-5810, the Christian Year (C.E.) - the Gregorian Year 1900-2050, the Muslim Year (the Muhamadan year) 1317-1472 (155 years) / by Asher Erlich ; [gathered by Dov Ben-Laish, Eliahu Erlich ; editor, Eliahu Erlich].

Asher Erlich 1878-1952

Elements of the Jewish and Muhammadan calendars : with rules and tables and explanatory notes on the Julian and Gregorian calendars / by Sherrard Beaumont Burnaby.

Sherrard Beaumont Burnaby