TY  - BOOK
AU  - Kelly,Anthony E.
AU  - Lesh,Richard A.
TI  - Handbook of research design in mathematics and science education 
SN  - 9781138975781
U1  - 507.1/ 
PY  - 2000///
CY  - New York , London 
PB  - Routledge 
KW  - Mathematics
KW  - Study and teaching
KW  - Research
KW  - Science
ER  -