000 00349cam a22001097a 4500
008 180718b2001 xxu||||| |||| 00| 0 eng d
100 _aEllerman, David
245 _aHirschmanian themes of social learning and change
_cby David Ellerman
260 _aWashington, D.C.
_bWorld Bank
_c2001
300 _a20p.
440 _aPolicy research working paper 2591
999 _c286408
_d286408