00506nam a2200157Ia 450000100070000000500170000700800410002402000150006510000340008024500680011425000110018226000320019330000190022550400560024465000480030028394520170223064024.0071109t2005    ag            000 0 spa d  a95050773351 aCaldarola, Gabriel, C.2Local10aDidáctica de las ciencias socialescGabriel Carlos Caldarola.  a2a ed.  aBuenos AiresbBonumcc2005.  a123 p.c22 cm.  aIncludes bibliographical references (p. [119]-123). 0aSocial sciencesxStudy and teaching.2Local