TY  - RPRT
TI  - Erwin A. Esper 1895-1972.
AU  - F Wesley
PY  - 1973
DO  - 10.1002/1520-6696(197307)9:3<187::aid-jhbs2300090302>3.0.co;2-4
UR  - https://pubmed.ncbi.nlm.nih.gov/11609820/
ID  - 11609820
ER  -