TY  - RPRT
TI  - Middle age: some early returns-a commentary.
AU  - C N Nydegger
PY  - 1976
DO  - 10.2190/eeaj-yjln-h5u5-uxpn
UR  - https://pubmed.ncbi.nlm.nih.gov/955720/
ID  - 955720
ER  -