00715nam a22002292 4500 0000004242 20151217145800.0 070521s xx 000 0 eng d 0262510375 : KES 200 (don.) KABU KABU QA462 .A23 1981 Abelson, Harold. 0000154705 Turtle geometry / Harold Abelson. Cambridge, Massachusetts : The MIT Press, 1981. x, 477 p. Geometry Study and teaching. 0000154706 Computer assisted instruction. 0000148153 DiSessa, Andrea. 0000154707 070521 1 2560 2560 0 0 lcc 0 KABU KABU 2015-12-17 0 QA462 .A23 1981 009604 2015-12-17 00:00:00 2015-12-17 BK