TY  - RPRT
TI  - A note on the concept endogenous-exogenous.
AU  - M J Heron
PY  - 1965
DO  - 10.1111/j.2044-8341.1965.tb00545.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5317894/
ID  - 5317894
ER  -