TY  - BOOK
ED  - Lesh, Richard
ED  - Secada, Walter
TI  - Some theoritical issues in mathematics education : papers from a research presession
T2  - Mathematics education report
U1  - 510.72 
PY  - 1979///
CY  - Ohio
PB  - ERIC clearinghouse for Science, Mathematic and Environmental Education
ER  -