TY - BOOK ID - 136100229 TI - Principles of educational and psychological measurement : a book of selected readings AU - Mehrens, William A. AU - Ebel, Robert L. PY - 1967 PB - Chicago (Ill.): Rand MacNally DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:136100229 AB - ER -