TY  - RPRT
TI  - Developmental sequences in class reasoning and propositional reasoning.
AU  - U Müller
AU  - B Sokol
AU  - W F Overton
PY  - 1999
DO  - 10.1006/jecp.1999.2510
UR  - https://pubmed.ncbi.nlm.nih.gov/10479396/
ID  - 10479396
ER  -