Columbia subject headings:
Labor Zionism--Palestine--History--Sources.
Mifleget ha-poʻalim ha-ʻIvrim ha-sotsyal-demoḳraṭim be-Erets Yiśraʾel (Poʻale-Tsiyon)--History--Sources.
Harvard subject headings:
World Socialist Union of Jewish Workers--Po'alei Zion--History--Sources.
Princeton subject headings:
World Socialist Union of Jewish Workers--Po'alei Zion--History--Sources.