Found this at imdb.com:
Based on the 1971 novel by William Peter Blatty
"Blatty's novelization of a real case of possession that happened in a Washington Suburb (Mt. Ranier, MD) puts Regan, an adolescent girl, Living with her mother in Georgetown in Washington, into a more and more difficult situation. She exhibits strange symptoms, including levitation and great strength. When all medical possibilities are exhausted, her mother is sent to a priest who is also a psychiatrist. He becomes convinced that Regan is possessed and he and a second priest experienced in exorcism try to drive the spirit from Regan before she dies. Very graphic for it's time."
Based on the 1971 novel by William Peter Blatty
"Blatty's novelization of a real case of possession that happened in a Washington Suburb (Mt. Ranier, MD) puts Regan, an adolescent girl, Living with her mother in Georgetown in Washington, into a more and more difficult situation. She exhibits strange symptoms, including levitation and great strength. When all medical possibilities are exhausted, her mother is sent to a priest who is also a psychiatrist. He becomes convinced that Regan is possessed and he and a second priest experienced in exorcism try to drive the spirit from Regan before she dies. Very graphic for it's time."
Buy on AliExpress.com