00331cam a22001217a 4500008004000000082001200040100001800052245005800070260002900128300001000157650002000167650002200187180718b1981   xxu||||| |||| 00| 0 eng d  aJ7 W152  aWalker, Bruce  aWelfare economics and urban problemscby Bruce Walker  aLondonbHutchinsonc1981  a319p.  aUrban economics  aWelfare economics