5Divid Bbraun and Dorald AEhms Filler and fiber retention n newsprint and groundwood specialties using polyethylene oxide septimber 1984 Tappi P110-114.
6R.H. Pelton ,L. H. Allen ,and H. M. Nugent Novel dual-polymer retention aids for newsprint and groun wood spec dzies Tappi November 1981 Vol. 64,No,11P89-92.
