00311nam a2200121Ia 4500020001500000082002500015100003000040245003900070260003500109300001300144500000500157700002700162  a072043601X  a330.0151564bH131.VM  aHadley, G and Kemp, M. C.  aVariational methods in economicsb  aAmsterdambNorth-Hollandc1971  ax, 378p.  a  aKemp, M. C. ; jt. auth