TY  - BOOK
AU  - Abelson,Harold
AU  - DiSessa,Andrea
TI  - Turtle geometry
SN  - 0262510375 :
AV  - QA462 .A23 1981
PY  - 1981///
CY  - Cambridge, Massachusetts
PB  - The MIT Press
KW  - Geometry
KW  - Study and teaching
KW  - Computer assisted instruction
ER  -