id author title date pages extension mime words sentence flesch summary cache txt crl-11427 Hazen, A. T. The Manufacture and Testing of Durable Book Papers (Book Review) 1961-06-30 2 .pdf application/pdf 1496 78 58 When book papers are made by the acid sulphite process, preservation becomes im- possible. For four hundred years after the first printers learned how to multi- ply the supply of books the demand for paper remained in uneasy equilibrium with the supply. cache/crl-11427.pdf txt/crl-11427.txt