Edwards Frank Strange People London Pan Books Ltd 1966 pp126 133 Myers F W H Human Personality and its Survival of Bodily Death New York University Books 1961 1903 Pp66 72 St Clair David Child Possessed London Corgi 1979 Published in U S in 1977 as Watseka Shirley R The Problem of Rebirth London Rider Co 1936 pp90 95 Wilson Colin Poltergeist Sevenoaks Kent New English Library 1981 pp71 3 i think they must be enough for you