This lecture by Howard M. Ervin was given at a 1975 Holy Spirit Seminar at Oral Roberts University. Ervin gives his testimony of his Pilgrimage into Pentecost. Oral Roberts and Howard Ervin hosted these seminars in the Mabee Center during the 1970's.
Ervin, Howard M., "1975 Holy Spirit Seminar - Testimony of Howard M. Ervin" (1975). Other Addresses at ORU. 5.