00290nam a2200109Ia 450000500170000000800410001708200140005810000160007224500340008826000500012230000080017220260224040941.0260224s9999||||xx |||||||||||||| ||und||  a333.7 QAZ  aQazi, S.A.  0aNatural resource conservation  aNew Delhi: A P H Publishers Corporationc2007  a452