Harper, Michael, 1931-, Spiritual warfare : [the dangers of the occult and how to be free from the devil] / [print] by Michael Harper. - Plainfield, New Jersey : Logos International, (c)1970. - x, 127 pages ; 18 cm. Includes bibliographical references. LCCN: 71135048 Subjects--Topical Terms: Devil.Christian life. LC Class. No.: BT981 BT981.H294.S657 1970