Documents belonging to Yaakov Schwebel: membership cards in National Labour Organisation, Brit Hatzohar (Union of Zionist Revisionists) in Eretz Israel, the High Committee of Hatzach (New Zionist Organization) in Eretz Israel; delegate cards from Hatzohar Eighth Conference, founding conference of National Labour Organisation in Eretz Israel, Hatzach First National Conference, Brit Hatzohar World Council, Revisionist Youth Conference "Brit Trumpeldor" in Poland.