"Paper Indústria i comerç." . . "Manuele constructietechnologie." . . "Polpa de fusta Indústria." . . . . . . . . . . . . . . . . "Science and technology of mechanical pulp manifacture" . . . . "Science and technology of mechanical pulp manufacture" . "Science and technology of mechanical pulp manufacture by N. G. Gavelin" .