Irish Labour Party and Trade Union Congress & O'Brien, W. (1917). Irish Trades Union Congress and Labour Party: Report of the twenty-third annual meeting held in the Guildhall, Derry, on Monday, Tuesday and Wednesday, 6th, 7th and 8th August, 1917. Irish Trades Union Congress and Labour Party National Executive.

Irish Labour Party and Trade Union Congress and William O'Brien. Irish Trades Union Congress and Labour Party: Report of the Twenty-third Annual Meeting Held in the Guildhall, Derry, on Monday, Tuesday and Wednesday, 6th, 7th and 8th August, 1917. Irish Trades Union Congress and Labour Party National Executive, 1917.