TY  - GEN
AU  - Usiskin Zalman
AU  - Flanders,James
AU  - Hynes,Cathy
TI  - Transition mathematics / 
SN  - 0673334058
AV  - QA39.2 
PY  - 1992///
CY  - Chicago, Ill.
PB  - University of Chicago, 
KW  - Mathematics
KW  - Study and teaching Secondary
ER  -