00389nam a2200121Ia 4500008004100000040001700041082002100058110005800079245003300137260007500170300001000245650001200255190329s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta530bN277P  aNational Council of Educational Research and Training 0aPrayogshala pustikabBhotiki  aNew DelhibNational Council of Educational Research and Trainingc2014  a306p.  aPHYSICS