Abstract
†This research was conducted under contract to NIDA. Its contents reflect only the views of the author. An earlier version of this paper was presented at the NIDA Community Epidemiology Work Group, Phoenix, December 11, 1987.
Notes
†This research was conducted under contract to NIDA. Its contents reflect only the views of the author. An earlier version of this paper was presented at the NIDA Community Epidemiology Work Group, Phoenix, December 11, 1987.