00345nam a2200121Ia 4500082001900000100002200019245008700041260003500128300001600163490003400179500000500213700000500218  a515.1bR975.VM  aRutherford, D. E.  aVector methods, applied to differential geometry, mechanics and potential theoryb  aEdinburghbOliver & Boydc1957  aviii, 135p.  aUniversity Mathematical texts  a  a