hood ▁of ▁an ▁American ▁Commun ist ," ▁Pennsylvania ▁Magazine ▁of ▁History ▁and ▁Biography , ▁vol . ▁ 1 1 7 , ▁no . ▁ 4 ▁( Oct . ▁ 1 9 9 3 ), ▁pp .   2 8 7 – 3 0 8 . ▁In ▁J ST OR . ▁ ▁St orch , ▁Rand i , ▁Red ▁Chicago : ▁American ▁Commun ism ▁at ▁its ▁Gr ass ro ots , ▁ 1 9 2 8 - 3 5 . ▁U rb ana , ▁IL : ▁University ▁of ▁Illinois ▁Press , ▁ 2 0 0 7 . ▁ ▁Z ips er , ▁Arthur , ▁Working class ▁Gi ant : ▁The ▁Life ▁of ▁William ▁Z . ▁F oster . ▁New ▁York : ▁International ▁Publish ers , ▁ 1 9 8 1 . ▁ ▁External ▁links ▁ ▁William ▁Z . ▁F oster ▁Writ ings ▁on ▁Marx ists ▁Internet ▁Archive . ▁ ▁Trade ▁Union ▁Edu c ational ▁League ▁documents ▁ ▁found ▁at ▁the ▁Marx ist ▁Internet ▁Archive . ▁ ▁The ▁Tri al ▁of ▁William ▁Z . ▁F oster ▁PDF ▁document ▁by ▁Robert ▁Minor . ▁The ▁Liber ator , ▁v . ▁ 6 , ▁no . ▁ 4 , ▁whole ▁no . ▁ 6 0 ▁( A pril ▁ 1 9 2 3 ), ▁pp .   8 – 1 2 . ▁ ▁The ▁Question ▁of ▁the ▁Un organ ized ▁William ▁Z . ▁F oster . ▁ 1 9 2 5 ▁ ▁Organ iz ational ▁Problem s ▁of ▁Indust rial ▁Union ism ▁William ▁Z . ▁F oster .