1987 (132-33 [1])- 1988 (134-135 [2-3], 137-140 [5-8])- 1989 (141-147 [9-15], 16, 20-21); This publication is a continuation of "Robotnik" (MRK "S", Warszawa) under the banner of the reactivated PPS (Polish Socialist Party). From 137/1988 a separate num