00367nam a22001337a 450000500170000000800410001702000080005804100080006608200170007410000200009124500590011126000490017030000140021920260617111630.0260617b        |||||||| |||| 00| 0 eng d  a000  aeng  a335.5bGRA/T  aGraaff, J.DE V.  aTheoriticalo welfare Ecomonics c/ by J. de V. Graaff   aNew York bCambridge University Press c1967  axii, 178p