RT Article T1 Active parental consent in school-based research: How much is enough and how do we get it? JF Evaluation review VO 32 IS 4 SP 335 OP 362 A1 Esbensen, Finn-Aage 1951- A2 Peterson, Dana A2 Taylor, Terrance J. A2 Melde, Chris LA English YR 2008 UL https://krimdok.uni-tuebingen.de/Record/1912448742 DO 10.1177/0193841X08315175