If you are working on research (whether it is for a book or just looking for information) you may find this list helpful. I’ll be updating this list with new resources often.
SEARCH ENGINES
Worldwide Library Search: www.worldcat.org – Search thousands of libraries worldwide!
Science: www.science.gov – It has 2200+ scientific sites. Millions of articles have been indexed for your use.
Academic Resource Search: www.refseek.com – Search billions of encyclopedia, monographies, magazines.
Scientific Documents: https://link.springer.com – Access millions of scientific documents, including books, articles, and research protocols.
Scientific Bioscience Journals: www.bioline.org.br Access a library of scientific bioscience journals published in developing countries.
Economics: http://repec.org – volunteers from 102 countries have collected almost 4 million publications on economics and related science.
Academic Studies: www.base-search.net – Search academic studies texts. This website has millions of scientific documents, the majority of them are free.