Gulen, M. Fethullah Emerald Hills of the Heart Key Concepts in the Practice of Sufism 4 - Clifton, Nj : Tughra Books, c2011 - XIV, 201 p. : ill Includes Bibliographical References and Index v. 4. ISBN: 9781597842136 ISSN: Subjects--Topical Terms: Sufism Doctrines Dewey Class. No.: 297.4 / GUL