Zalman Shneour, Aharon Lurya, bamah teʼaṭronit shel śaḥḳanim ṿe-omanim ʻolim mi-Berit ha-Moʻatsot Idiṭron, Histadrut ha-kelalit shel ha-ʻovdim be-Erets-Yiśraʼel. Merkaz ha-ḳoʼoperatsyah, Leib Folber