Valuable collections and documents are made into microfilms for preservation and for viewing by users. These materials include rare books in Chinese and foreign languages, Macao local documents, back issues of periodicals in Western languages, old gazettes of Portuguese colonies, amongst others. In addition, the library also acquires microfilm records of old local newspapers, including Southwest Journal, Jornal do Cidadão, World Daily, Jornal Va Kio, Jornal Tai Chung, Diario Matutino and Diario Vespertino. Microfilm records are available for viewing and printing at the libraries only.