TY  - BOOK
AU  - Rumsey, Stephen Reed
TI  - An Analysis of proportional reasoning topics in high school chemistry from a cognitive development perspective
PY  - 1986///
CY  - Ann Arbor, Mich.
PB  - University Microfilms International
KW  - Chemistry
KW  - Study and teaching (Secondary)
N1  - MF 2889; Thesis (Ph. D.) - State University of New York at Albany, 1986
ER  -