I am looking for a source(s) of birth records for Kassa (Kosice) (Austria-Hungary) (Slovakia) for Jewish births for the period of 1905 to 1915. My father's birth surname was spelled Lefkovits or Lefkovics or Lefkowitz (Andor) at different times/locations. He (1908) and his brother, Zoltan (1905) were both born in Kassa to Mor Lazar Lefkovics (sp?) and Mariska Reich. Any leads for sources to this documentation would be very much appreciated.