Spencer Dale. Smith  <br />Union of the soul, union with God: The use of vernacular theology by Jean Gerson, Nicholas of Cusa, and Denys the Carthusian,  a dissertation submited in the Graduate School ... for the degree  Doctor of Philosophy (field of religion), Evanston (Ill.), Northwestern University, 1997, III-258 + p.  <br />[Smith 1997]