TY  - RPRT
TI  - Programmed instruction and learner characteristics: preliminary data.
AU  - R E Ripple
AU  - R O'Reilly
AU  - L Wightman
AU  - J Dacey
PY  - 1965
DO  - 10.2466/pr0.1965.17.2.633
UR  - https://pubmed.ncbi.nlm.nih.gov/5833749/
ID  - 5833749
ER  -