"Luftverunreinigender Stoff Papierzerfall." . . "Veroudering (anorganische materie)" . . "Paper chemistry." . . "Papperskonservering." . . "Paper conservation & restoration." . . "Air Pollution." . . . . "Papier deterioracja." . . "Papierzerfall Luftverunreinigender Stoff." . . "Papier." . . "Papier konserwacja i restauracja." . . "Onderzoek." . . . . . . . . . "Met samenvatting in het Nederlands" . . . . . . . . . . . . . . . . . . . . "Environmental influences on the deterioration of paper" . . "Environmental influences on the deterioration of paper"@en . . . "Academic dissertations"@en . .