00352nam a2200121Ia 450000500170000000800410001702000180005805000150007610000150009124500760010626000280018265000200021020251229085340.0251229s9999    xx            000 0 und d  a0 582 29004 X  aH 62.S621   aWilson,M.J 0aSocial and educational research in actionbA book of readingscJ Wilson  aNewyorkb Longmanc1978  aSocial Sciences