Parallel extracts from forty-five manuscripts of Piers Plowman [by William Langland], with notes upon their relation to the Society's [i.e. Early English Text Society] three-text edition of this poem /
Skeat, Walter W.(Walter William),1835-1912.
Langland, William,1330?-1400?.Piers Plowman.
New York : Greenwood,
1969.