00869nam a2200253 u 450000100070000000500170000700800410002403500110006503500210007604000130009704100080011008200080011810000410012624500680016726000370023530000190027265000340029165000440032565000420036965000410041194200090045299900190046195201350048067693820260506091352.0010727s1971 eng a676938 a(OCoLC)777799818 ccomduadb aeng 4a37110aTickton, Sidney G.4edteedt947597513aTo improve learning : an evaluation of instructional technology aEstados Unidos :bBowker,c1971. a1087 páginas aEducational technology977366 aTeaching materials and equipment977134 aMaterial y equipo didácticos977135 7aTecnología educativa2embne949590 cBOOK c203754d203754 001040708GENERALaSIMIbSIMId2001-07-27iC691601l0o371.3078 I/T627p61000003673171r2023-04-23 00:00:00t1w2023-04-23yBOOK