TY - BOOK ID - 131655819 TI - The principal as staff developer AU - DuFour, Richard AU - Sparks, Dennis PY - 1991 SN - 1879639017 PB - Bloomington, Ind. National Educational Service DB - UniCat KW - School management UR - https://www.unicat.be/uniCat?func=search&query=sysid:131655819 AB - ER -