Unum necessarium, or, The great duty of a Christian, in two tracts; the one, Of adhering to God, written in Latin, by Albertus Magnus, the other, Of the love of God, written in high-Dutch, by John Staupitz.

Photocopy. Washington, D.C. : Library of Congress Photoduplication Dept., [1981?] ; Incudes two treatises by Johann von Staupitz with special t.p.: Two ancient spiritual treatises of John of Staupitz . concerning the sweet love of God, and our holy Christian faith. ; De adhaerendo Deo has also been attributed to Johannes von Kastl. ; Mode of access: Internet.