DISCUS interactive system
Subtitle: users' manual : by Steven S. Silver, Joseph C. Meredith
Publisher: U.S. Department of Health, Education, and Welfare, Office of Education, Bureau of Research
Published: 1971
Place of publication: Washington]
Language: eng
Number of pages: 170
Notes: "Final report, project no. 7-1083, grant no. OEG-1-7-071083-5068."