TY  - RPRT
TI  - A contingency model for the design of problem-solving research programs: a perspective on diffusion research.
AU  - G Gordon
AU  - A E MacEachron
AU  - G L Fisher
PY  - 1974
UR  - https://pubmed.ncbi.nlm.nih.gov/4496751/
ID  - 4496751
ER  -