00293nam a2200121Ia 4500003000400000008004100004020001400045040000800059100001900067245004800086260002900134300000800163LDD181029s9999    xx            000 0 und d  a893972185  cLDD  aHartley, James 0aDesigning instructional textcJames Hartley  aLondonbKogan Pagec1985  a175