Piers Plowman Forty Years On.
A survey of editorial, scholarly, and critical studies published in the time since S. S. Hussey’s M.A. thesis, “Eighty Years of Piers Plowman Studies: A Study of Critical Methods” (University of London, 1952). Contains a call for “a detailed and sophisticated historical contextualisation for Langland’s poem, not exclusively from an intellectual and theological point of view and not necessarily, either, from the point of view of historical or cultural materialism.”
Phillips, Langland, the Mystics and the Medieval English Religious Tradition 1-9.