00321nam a22000977a 450000500170000000800410001702000110005804000080006924501010007726000450017820200825105211.0200825b           ||||| |||| 00| 0 eng d  a135282  cCML  aThe Environment of Learning: Conflict and Understanding in the Secondary School.cRichardson, E.  aLondonbThomas Nelson and Sons Ltdc1967