TY  - RPRT
TI  - Changes in cognitive functioning of the oldest old.
AU  - B Johansson
AU  - S H Zarit
AU  - S Berg
PY  - 1992
DO  - 10.1093/geronj/47.2.p75
UR  - https://pubmed.ncbi.nlm.nih.gov/1538071/
ID  - 1538071
ER  -