Joseph Wittig <br/><br/>
Piers Plowman  Concordance 

 -  The Athlone Press  2001 
 - Piers Plowman: the Three Versions .
<br/><br/><label>ISBN: </label>9780485115451 
<br/><br/><label>Subjects--Topical Terms: </label><br/> General<br/>English language--Middle English, 1100-1500--Glossaries, vocabularies, etc.<br/>LITERARY CRITICISM