"Betar Bi-Sheerit Ha-Pletah" (Betar Among the Surviving Remnant) by Haim Lazar:
Materials Collected for Book: article by Yehiel Kadishai 'Everyone Saw a Life Support in Him - Eternal Flame of Betar Member David Perach Blum", list of Betar Training Units, article by David Perach about Yitzhak Segraski, article by Rachel Salkia "My Activity in the Movement After the Liberation", materials by Yaakov Goldstein about Betar Cyprus, material by David Shaari "Cyprus Exile, 1946-1949"