TY - BOOK ID - 145759407 TI - Turtle geometry : the computer as a medium for exploring mathematics AU - Abelson, Harold. AU - DiSessa, Andrea A. PY - 1986 PB - The MIT Press DB - UniCat KW - Geometry KW - Computer-assisted instruction. UR - https://www.unicat.be/uniCat?func=search&query=sysid:145759407 AB - ER -