Correspondence of Dr. Abraham Heller and his wife Jutta (Kastrel) with their family and friends from the 1920s-1950s and their personal documentation

- personal documents of Dr. Abraham Heller and Jutta Kastrel issued in Riga, Vilna, Berlin and in Eretz Israel in the 1920s-1940s. The documents include school certificates, grade transcripts, documents related to Abraham Heller's studies in Berlin and his work in various schools in Eretz Israel, and more; - "Die Juden in Russland seit der Revolution 1917 bis zur Gegenwart": Abraham Heller's doctoral thesis submitted in 1934, along with his biography; - articles by Dr. Abraham Heller...