TY  - GEN
AU  - Penn, M. W.
AU  - Penn, M. W. 
TI  - Square Bear: a fairytale of polygons
SN  - 9780984042531
U1  - AP Nursery 516 
PY  - 2011///
CY  - [S.l.]
PB  - MathWord Press
UR  - 000003/0000032c.jpg
ER  -