Pretreatment of cold soda pulp with nitric acid and ektorine before sulfonation by sodium sulfite.
Singh S.v.
Rai A.k.
Bhandari S.s.
Singh P.s.
Nordic Pulp Paper Res.J.. Roč. 6, č. 1 (1991), 27-29 res.angl., 5 tab.
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