TY  - RPRT
TI  - Working backward and working forward in problem solving.
AU  - W S Anthony
PY  - 1966
DO  - 10.1111/j.2044-8295.1966.tb01003.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5938974/
ID  - 5938974
ER  -