Books

Books at AU and The State and University Library
Books at Geoscience. New books (1990-) is found in the library. Older books are in the archive. You can make a reservation for them in the library catalogue. Write you search AFTER 'location: ugeol'.
bibliotek.dk - books published in Denmark and the holdings of Danish libraries.
Google Books  - Books from book shops and libraries: Books from danish libraries - bibliotek.dk and from foreign libraries - among others Howard University, Oxford University, University Library of Lausanne, and The Bavarian State Library.
Google Scholar  - articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.

Worldcat - the world's largest network of library content and services

eBooks

eReolen - eBooks fra the public libraries
ebrary - eBooks in all subject areas 
Ebsco eBook collection - eBooks in all subject areas
Ebook Library
Bookboon.com - free eBooks and textbooks