000 00331nam a2200073 4500
080 _a
_b
245 _aBS-4432 (Part 4) - 1980/ISO 3688 - 1977; Methods for determining optical properties of pulp, paper and board Part 4 measurement of diffuse blue reflectance factors (ISO brightness) of pulps
700 _aBritish Standards Institution
260 _aLondon
_bBSI
_c1980
300 _a5p
999 _c31408
_d31408