TY  - RPRT
TI  - AN INDUSTRYWIDE STUDY OF PROGRAMED INSTRUCTION.
AU  - P WELSH
AU  - J A ANTOINETTI
AU  - P W THAYER
PY  - 1965
DO  - 10.1037/h0021694
UR  - https://pubmed.ncbi.nlm.nih.gov/14279761/
ID  - 14279761
ER  -