00376pab a2200121 454500008004000000100002500040245011900065260000900184300001500193362000800208650001800216773002000234180718b2012   xxu||||| |||| 00| 0 eng d  aMaravic, Patrick Van  aLimits of knowing or the consequences of difficult - access problems for multi - method research and public policy  c2012  ap.153-168.  aJun  aPublic policy  aPolicy Sciences