TY - BOOK TI - The principal : creative leadership for effective schools AU - Ubben, Gerald C. AU - Hughes, Larry W., 1931- SN - 0205102980 PB - Allyn and Bacon PP - Boston : Allyn and Bacon, c1987. PY - 1987 UR - https://library.korea.ac.kr/detail/?cid=CAT000000124614&ctype=m