00510nam a2200145Ia 4500008004100000010001300041040001700054082002800071100001800099245007500117260004600192300001500238650008500253700002600338190327s9999||||xx |||||||||||||| ||und||  a66-10014  aNITILcNITIL  221sta370.315006bS653C  aSmith, Karl U 0aCybernetic principles of learning and educational designcKarl U Smith  aNew YorkbHolt, Rinehart and Winsonc1966  axiv, 529p.  aCybernetic; Educational technology; Teaching-Aids and devices; Teaching machines  aSmith, Margaret Foltz