TY  - RPRT
TI  - Learner attitudes as a variable in the use of programmed material.
AU  - D W Podshadley
AU  - M K Chen
AU  - R John
AU  - P A Ratcliff
PY  - 1968
UR  - https://pubmed.ncbi.nlm.nih.gov/5247055/
ID  - 5247055
ER  -