Jeffrey started following the work of Mark Dratch, Yeshiva University, IBC. 2012-04-01 13:07:00 -0700

Jeffrey started following the work of Avi Septimus, Bar-Ilan University, School Of Engineering. 2012-03-21 01:20:48 -0700

Jeffrey started following the work of Yoel Finkelman, Bar-Ilan University, Contemporary Jewry. 2012-03-04 02:52:37 -0800