00422nam a2200145Ia 4500008004100000020001500041041000800056082001500064100002000079245008800099250000600187260005400193300001200247650001700259210716s2000    xx            000 0 und d  a9810238886  aeng  a530.1 HSUJ  aHsu, Jong Ping.  aEinsteins relativity and beyond: new symmetry approaches.bNew symmetry approaches.  a1  aNew JerseybWorld Scientific Publishing Co.c2000  axxi,418  aPhysics(530)