000 00244nam a2200085Ia 4500
008 180131b1963 xxu||||| |||| 00| 0 eng d
080 _a
_b
100 _aIndian Standards Institution
245 _aIs: 2407 - 1963; Specification For Photometric Integrators
260 _a
_bBIS
_c1963
999 _c49906
_d49906