TY  - RPRT
TI  - Secular trends and individual differences in toilet-training progress.
AU  - J A Martin
AU  - D R King
AU  - E E Maccoby
AU  - C N Jacklin
PY  - 1984
DO  - 10.1093/jpepsy/9.4.457
UR  - https://pubmed.ncbi.nlm.nih.gov/6520660/
ID  - 6520660
ER  -