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101 0 $aeng
200 10$aTurtle geometry $ethe computer as a medium for exploring mathematics /$fHarold Abelson, Andrea A. diSessa
210   $cThe MIT Press
311   $a0-262-01063-1 
517   $aTurtle Geometry 
606   $aGeometry$xComputer-assisted instruction
615  0$aGeometry$xComputer-assisted instruction.
676   $a516/.007/8
700  0$aAbelson$b Harold$027443
701  0$aDiSessa$b Andrea A$044127
906   $aBOOK
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996   $aTurtle geometry$91533858
997   $aUNINA