RT Article T1 Demographic and socioeconomic correlates of powder cocaine and crack use among high school seniors in the United States JF The American journal of drug and alcohol abuse A1 Palamar, Joseph J. A1 Ompad, Danielle C. A2 Ompad, Danielle C. LA English YR 2013 UL https://krimdok.uni-tuebingen.de/Record/1912508311 DO 10.3109/00952990.2013.838961