TY  - RPRT
TI  - Programmed learning: prologue to instruction.
AU  - R J Seidel
PY  - 1967
DO  - 10.2466/pr0.1967.20.1.307
UR  - https://pubmed.ncbi.nlm.nih.gov/6037815/
ID  - 6037815
ER  -