TY  - RPRT
TI  - Does 3rd age plus 3rd world equal 3rd class?
AU  - K Tout
PY  - 1992
DO  - 10.1093/oxfordjournals.cdj.a038597
UR  - https://pubmed.ncbi.nlm.nih.gov/12286290/
ID  - 12286290
ER  -