This is a microfilm and microfiche set of publications of contemporary left-wing organizations in Britain. The documents are issued each year; the guides every other year.

GUIDE: Left in Britain: a checklist and guide; with historical notes to 37 leftwing political movements and groupings active in Britain between 1904 and 1972, whose publications comprise the Harvester/Primary Social Sources microfilm collection. B-26829 Checklist and guides published biennially, 1973–.