00294nam a2200109Ia 4500008004100000022001800041040002500059082001700084100002100101245002500122260003700147240215s9999    xx            000 0 und d  a0-675-20890-4  aNORSU-DumcNORSU-Dum  a371.9/H49/c8  aHeward, William  0aExceptional Children  bMerrill Publishing Companyc1988