00272nam a2200109 a 450000500170000008200170001710000160003424500460005026000270009630000180012363000210014120251202164222.0  a300.18,bWIL  aWilkinson T  aMethodology techniques of social research  aBombaybHimalayac1986  a440 p.b24 cm  aSocial  research