National Library of the Philippines

Philippine Elibrary

Philippine Elibrary OPAC
Philippine Languages and Linguistics

Philippine Languages and Linguistics Annotated Bibliography
President Manuel A. Roxas Bibliography

An Annotated Bibliography on President Manuel A. Roxas
Project Gutenberg

OPAC of freely downloable books from Project Gutenberg.
The National Science Foundation

Online library for education and research in Science, Technology, Engineering, Mathematics. It contains many freely available materials.
UN Bibliographic Information System
University of Florida Digital Collections

Free and Open Access. Contains manuscripts and letters, antique maps, rare children's literature books, newspapers, historic photographs, oral histories, and more
UP Diliman Main Library

UP Diliman Main Library OPAC. Includes bibliographic data from other UP Diliman Libraries
US Library of Congress

US Library of Congress OPAC
US NLM

US National Library of Medicine OPAC

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