Grateful acknowledgment is hereby made to the following researchers and contributors: * William H. Wood, ex-Army Visual Education instructor, parent-child relations specialist, board member of the Pasadena Dianetics Group * Idella Stone, H.D.A., Hubbard Dianetic Service Center, Pasadena, California. * William T. Powers, H.D.A., graduate student in Physics, Northwestern University * Henry Mauerer, H.D.A., psychologist * Edward A. Reese, H.D.A., professional bibliographer * Jon Ross, H.D.A., former psychologist parental counselor, nursery school supervisor, lecturer on child development * Julia Lewis, H.D.A., president of the Compton Counseling Service, member of the Southwest Counseling Service, specialist in re-educational play for children * Waldo T. Boyd, H.