TY  - GEN
ED  - BRITISH STANDARDS INSTITUTION
TI  - BS 2690 : Pt. 13 : 1972 : Methods of testing water used in industry : dichromate value, non-volatile organic carbon tannis and chlorine
PY  - 1972///
CY  - London
PB  - B.S.I.
N1  - STD691
ER  -