Piers Plowman: concordance : Will's visions of Piers Plowman, do-well, do-better, and do-best : a lemmatized analysis of the English vocabulary of the A, B, and C versions as presented in the Athlone by Joseph S. Wittig. ISBN 048511545X. Published by Athlone Press in 2001. Publication and catalogue information, links to buy online and reader comments.