TY - BOOK ID - 127816850 TI - Handbook in research and evaluation : a collection of principles, methods, and strategies usefull in the planning, design, and evaluation of studies in education and the behavioral sciences AU - Isaac, Stephen AU - Michael, William B. PY - 1977 PB - San Diego (Calif.) : EDITS, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:127816850 AB - ER -