Sefer Haʾibbur a treatise on the calendar - Ibn-ʿEzra, Avraham Ben-Meʾir 1092-1167 (Ktav, 2011)
Includes bibliographical references
Keywords: Ibn-ʿEzra, Avraham Ben-Meʾir -- 1092-1167; Geschichte 1146; Jewish calendar -- Early works to 1800; Jewish chronology -- Early works to 1800; Chronologie; Mathematik; Judentum; Kalender; Jahreslauf; Quelle; Text