00369nam a2200121Ia 4500008004100000100005300041245009800094260001100192260001500203260000900218300000800227490001200235201214s9999    xx            000 0 und d  aTrott, Andrew, Strongman, Harry and Giddins, Les 0aAspects of Educational Technology- vol.XVI : Improving Efficiency in Education and Training    aLondon  bKogan Page  c1983  a237  vVol.-XV