Donald C. Adcock, 86, director of library services at Glen Ellyn (Ill.) School District 41 from 1963 to 1989, died July 15. He served as coordinator for program support of the American Association of School Librarians (AASL) and later as interim director. After leaving AASL, he became university supervisor and then interim director for the school library media program at Dominican University in River Forest, Illinois.