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Research methdology and systems analysis 

 - New Delhi  Anmol Publications Pvt.Ltd.  2001 
 - viii,269p.  22cm.HB. 
 - Encyclopaedia of environmental pollution and awareness in .. .
<br/><br/><label>ISBN: </label>8126109297 
<br/><br/><label>Dewey Class. No.: </label>363.7072  / PRA