00266nam a2200109Ia 450000500170000000800410001708200150005810000140007324500270008726000340011430000080014820260205041215.0260111s9999||||xx |||||||||||||| ||und||  a152  H618P  aHirst R J 0aProblems of perception  aLondonbAllen and Unwinc1959  a330