TY  - BOOK
AU  - Hoffmann,Michael H.G.
AU  - Lenhard,Johannes
AU  - Seeger,Falk
ED  - SpringerLink (Online service)
TI  - Activity and Sign: Grounding Mathematics Education 
SN  - 9780387242705
AV  - LC8-6691 
U1  - 370 23
PY  - 2005///
CY  - Boston, MA
PB  - Springer US
KW  - Education
KW  - Science
KW  - History
KW  - Mathematics
KW  - Mathematics Education
KW  - Philosophy
KW  - History of Science
UR  - http://dx.doi.org/10.1007/b105055
ER  -