Sources
Card for "Aktionsjuden" (special operation Jews) released from Dachau of Isidor Merkel
Isidor Merkel's card contains his prisoner number and his release date.
Card for "Aktionsjuden" (special operation Jews) released from Dachau of Isidor Merkel, 1.1.6.7/10707407, ITS Digital Archive, Arolsen Archives.

