00319nam a2200121 a 450000500170000008200160001710000180003324500490005125000120010026000320011230000280014463000250017220251202164231.0  a300.72bKOT  aKothari, C.R.  aResearch methodologybmethods and techniques  a2nd ed.  aDelhiIbWiley Easternc1986  axiiI, 500 p.b22cm.cPB  aResearch methodology