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Katalog Online

APTIK Digital Library
merupakan katalog bersama Jaringan Perpustakaan APTIK.
Indonesia One Search
sebuah pintu pencarian tunggal untuk semua koleksi publik dari perpustakaan, museum, dan arsip di seluruh Indonesia. Selain itu, portal ini juga menyediakan akses ke sumber elektronik internasional (e-resources) yang dilanggan oleh Perpusnas RI untuk semua anggota yang terdaftar.

E-Dictionary & Thesaurus

Merriam-Webster Dictionary
OneLook Dictionary
Kamus Besar Bahasa Indonesia Daring
Tesaurus Tematis Bahasa Indonesia

E-Resources

E-Resources Perpustakaan Nasional RI
Electronic Thesis
Internet Archive

Open Access Journals

Directory of Open Access Journals:
DOAJ (Directory of Open Access Journals) was launched in 2003 with 300 open access journals.
Elsevier Open Access Journals
Education Resources Information Centre (ERIC) Institute of Education Sciences
MORAREF (Portal Akademik Kementrian Agama)
(The) National Academies Press
Portal Garuda  (Garba Rujukan Digital Ristekdikti)
Pubmed Central
Springer Open Access Journals
Wiley Open Access Journals

Open Access E-books

Directory of Open Access Books
DOAB is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users to find trusted open access book publishers. All DOAB services are free of charge and all data is freely available.
Ebooksgo
Encyclopedia
Encyclopedia Britannica Online
OAPEN 
OAPEN promotes and supports the transition to open access for academic books by providing open infrastructure services to stakeholders in scholarly communication.
Project Gutenberg
Project Gutenberg is a library of over 60,000 free eBooks.
Springer Open Access Books