Initial data from a survey of drug usage among college students was presented. A large-scale effort was made to produce reliable figures on: (1) drug use patterns; (2) attitudes toward drug use; and (3) incidence of drug use among college students. Questionnaires were answered by 26,000 college students from the Denver-Boulder area, who were delineated according to sex, age, race, religious background, marital status, academic year and standing, field of concentration, living situation, type of school, parental income and social class. The questionnaire addressed itself to the following issues: (1) frequency of use; (2) mood states at the time of usage; (3) age at first usage and reasons for continuing or discontinuing the use of drugs; (4) attitudes of users and non-users toward drug use; (5) plans for future use; and (6) attitudes toward drug legislation. The data, which focused primarily on amphetamines, marihuana, and LSD, were carefully analyzed. The liabilities of this type of research are mentioned. (TL)