TY - BOOK ID - 10374735 TI - Validity and social experimentation : Donald Campbell's legacy PY - 2000 SN - 0761911618 PB - Thousand Oaks (Calif.) : Sage, DB - UniCat KW - #SBIB:303H12 KW - #SBIB:303H60 KW - #SBIB:003.IO KW - Methoden en technieken: sociale wetenschappen KW - Bijzondere methoden: algemeen KW - Evaluation research (Social action programs) KW - Experimental design. KW - Social sciences KW - Research KW - Methodology. KW - Evaluation research (Social action programs). UR - https://www.unicat.be/uniCat?func=search&query=sysid:10374735 AB - ER -