Text ( visual ) : unmediated The essence of Sufism / John Baldock. -- London : Arcturus Pub. , c2004. -- 238 p. ; 22 cm. -- Includes bibliographical references (p. 229-232) and index. -- ISBN 0572030525 ; (BA82209644) ; https://ci.nii.ac.jp/ncid/BA82209644 Author Heading(s): Baldock, John. -- Classification(s): LCC : BP189.3 ; DC22 : 297.44. -- Subject Heading(s): LCSH : Sufism -- Doctrines ; LCSH : Spiritual life -- Sufism