New study finds glamorization of drugs in rap music jumped dramatically over 2 decades / Eurekalert, 1 April 2008
http://www.eurekalert.org/pub_releases/2008-04/uoc--nsf033108.php
"A new study finds that references to illegal drug use in rap music jumped sixfold in the two decades since 1979, the year Sugar Hill Gang's "Rapper's Delight" hit the charts and introduced to a mainstream audience a music genre born from inner-city America."