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090 _a146626
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200 1 _aEffects of examples and their explanations in a lesson on recursion
_ea production system analysis
_fPeter Pirolli
461 1 _aCognition And Instruction
_vVol. 8, nº 3 (1991), p. 207-259
606 1 _aDeposito de Rectaguarda
686 _a0220 - Depósito de Retaguarda
700 1 _aPirolli
_bPeter
856 _uhttps://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/dr.htm