RT Article T1 Substance use estimates from RDD and area probability samples: impact of differential screening methods and unit nonresponse JF Public opinion quarterly VO 60 IS 4 SP 563 OP 573 A1 Aquilino, William S. A2 Wright, Debra L. LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1639824219 K1 Drogenkonsum K1 USA K1 Opferbefragung