TY  - RPRT
TI  - Intellectual changes in aged twins.
AU  - L F JARVIK
AU  - F J KALLMANN
AU  - A FALEK
PY  - 1962
DO  - 10.1093/geronj/17.3.289
UR  - https://pubmed.ncbi.nlm.nih.gov/14451358/
ID  - 14451358
ER  -