TY  - RPRT
TI  - An operational approach to developmental planning.
AU  - A Waterston
PY  - 1971
DO  - 10.2190/t31g-a6wc-3tx5-dcwx
UR  - https://pubmed.ncbi.nlm.nih.gov/5136229/
ID  - 5136229
ER  -