TY  - RPRT
TI  - Physical working capacity and age.
AU  - L E Böttiger
PY  - 1971
DO  - 10.1111/j.0954-6820.1971.tb07443.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5149262/
ID  - 5149262
ER  -