TY  - RPRT
TI  - Accelerative trends in intellectual development.
AU  - L K Koppen-Thulesius
AU  - H Teichmann
PY  - 1972
DO  - 10.1111/j.2044-8260.1972.tb00815.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5077880/
ID  - 5077880
ER  -