Three unpublished calendars from Asyut / Alexander Pogo.
In:
Osiris Vol. 1 (1936), p. 500-509, Numero monografico dal tit.: A volume of studies on the history of mathematics and the history of science presented to David Eugene Smith on his 76th birthday, Jan. 21, 1936 / edited by George Sarton
Osiris Vol. 1 (1936), p. 500-509, Numero monografico dal tit.: A volume of studies on the history of mathematics and the history of science presented to David Eugene Smith on his 76th birthday, Jan. 21, 1936 / edited by George Sarton