refseek.com
www.worldcat.org/
link.springer.com
http://bioline.org.br/
repec.org
science.gov
pdfdrive.com
not a full image description but added the links and part of the descriptions to a textfile, figured i might aswell attach it here too refseek.com - academic resource search, encyclopedia, monographies, magazines worldcat.org - content of 20thousand worldwide libraries, find where lies the nearest rare book you need link.springer.com - access to 10million scientific documents, books, articles, research protocols bioline.org.br - library of scientific bioscience journals published in developing countries repec.org - 4million publications on economics and related science science.gov - american state search engine on 2200+ scientific sites. more than 200million indexed articles pdfdrive.com - largest website for free download of books in pdf format, claiming over 225million names edit: some extra i found in the comments book4you.org libgen.rs archive.org openlibrary b-ok.cc semantic scholar researchgate b-ok.lat - z library project gutenberg - classic books jstor - journals and publications




















