000			00353nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
082			_a541
082			_b3 P97P
100			_a"Puri, B.R"
245		0	_aPrinciples of Physical C
250			_a30th
260			_aNew Delhi
260			_bShoban Lal Nagin Chand &
260			_c1989
300			_axi-1202
999			_c29495 _d29495