The Monitoring the Future national results on adolescent drug useLloyd Johnston · First published 2000Open the Tome
Drug use among American high school seniors, college students and young adults, 1975-1990Lloyd Johnston · First published 1991Open the Tome
Illicit drug use, smoking, and drinking by America's high school students, college students, and young adults, 1975-1987Lloyd Johnston · First published 1988Open the Tome
National trends in drug use and related factors among American high school students and young adults, 1975-1986Lloyd Johnston · First published 1987Open the Tome
Drug use among American high school students, college students, and other young adultsLloyd Johnston · First published 1986Open the Tome
Use of licit and illicit drugs by America's high school students, 1975-1984Lloyd Johnston · First published 1985Open the Tome
Highlights from Drugs and American high school students, 1975-1983Lloyd Johnston · First published 1984Open the Tome
Highlights from Drug use among American high school students, 1975-1977Lloyd Johnston · First published 1978Open the Tome
Drug use among American high school students, 1975-1977Lloyd Johnston · First published 1977Open the Tome
Handbook of Northwestern plantsHelen Margaret Gilkey, Lloyd D. Johnston · First published 1967Open the Tome
