Other Search Engines.

📌www.refseek.com – Search for academic resources. More than a billion sources: encyclopedias, monographs, magazines.

📌www.worldcat.org – Search content from 20,000 libraries around the world. Find the rare book nearest you.

📌https://link.springer.com – Access to more than 10 million scientific documents: books, articles, research protocols.

📌www.bioline.org.br is a library of scientific journals in biosciences published in developing countries.

📌http://repec.org – Volunteers from 102 countries collected nearly 4 million publications on economics and related sciences.

📌www.science.gov is a U.S. state search engine with more than 2,200 scientific sites. More than 200 million articles are indexed there.

📌www.base-search.net is one of the most powerful search engines for academic study texts. More than 100 million scientific documents, 70% of which are free.