Lloyd Johnston

Monitoring the Future national survey results on drug use, 1975-2018: Volume I, Secondary school students

Patrick O'Malley, Megan Patrick, L. Johnston, 2000 .

Monitoring the Future national survey results on drug use, 1975-2018: Overview, key findings on adolescent drug use

Patrick O'Malley, Megan Patrick, L. Johnston, 2015 .