. . "Dr. Abraham Silberschein Archive: Correspondence with Dr. Maurycy Richter, a Zionist activist and refugee from Poland in Romania, regarding the possibilities of transferring children from Poland to Romania and Hungary, Richter's aliya to Eretz Israel, dif"@eng . "Dr. Abraham Silberschein Archive: Correspondence with Dr. Maurycy Richter, a Zionist activist and refugee from Poland in Romania, regarding the possibilities of transferring children from Poland to Romania and Hungary, Richter's aliya to Eretz Israel, dif"@eng . .