000 00319nam a2200133Ia 4500
008 190711s9999 xx 000 0 und d
020 _a817041380X
082 _a509 P724
100 _aPLEDGE,H.T
245 0 _aHISTORY OF SCIENCE
260 _aNEW DELHI
_bAnmol Publication
_c1990
300 _a26X16
942 _cBK
_2DDC
999 _c23474
_d23474