00513nam a2200181Ia 4500999001700000003000400017005001700021008004100038020001800079040000900097082001800106100002800124245005300152260005000205300000900255650002400264942004300288  c35474d35474OSt20201211121140.0190216s9999||||xx |||||||||||||| ||und||  a9780709917700  coclc  a371.93bMOR/B  aMortimore, Peter 97391 0aBehaviour Problems In Schools /cPeter Mortimore  bCroom Helm London And Sydney,c1983.aLondon:  a149p  aGeneral Collections  cREF2ddch371.93iMOR/Bk371.93mMOR/B