This document by Jim Lane provides an analysis of The Republican Movement and Socialism, 1950-70 and was originally published as a supplement to the Starry Plough (organ of the Irish Republican Socialist Party) in December 1987. This version was a revised and updated piece from 1989 (and there is some prescience in the analysis that the then WP had tilted to reformism and was in the process of becoming a second Labour Party).
Please click on the following link The Republican Movement and Socialism, 1950-70. Below links IRA Belfast Brigade Area + Miscellaneous Notes on Republicanism and Socialism in Cork City 1954- 69 by Jim Lane.
Miscellaneous Notes on Republicanism and Socialism in Cork City 1954- 69 . (Thanks to Cedar Lounge Revolution)https://cedarlounge.wordpress.com/2015/08/17/irish-left-open-history-project-miscellaneous-notes-on-republicanism-and-socialism-in-cork-city-1954%E2%80%9369-by-jim-lane-cork-2005/