00343nam a2200121Ia 4500008004100000040003800041100001600079245003100095250001700126260004200143300001500185653002100200211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aLandau, L D 0aClassical theory of fields  aRevised ed.4  bAddison Weslwy PressaCambridgec1951  aix,354p p.  aForce and energy