Very useful sites for researchers ????#The most important sites and links that benefit students and researchers: - The global Bookboon website for downloading free books in various disciplines.. http://bookboon.com/fr - The scientific website of the British University of Bath, download whatever you want for free in PDF format.. http://opus.bath.ac.uk/ - The scientific website of the University College of London contains free university theses and research in various disciplines.. http://discovery.ucl.ac.uk/ - From this link you can download all master's theses and doctoral dissertations discussed at Ohio University in the United States for free.. https://etd.ohiolink.edu/pg_1?0 - Munich University Library The library contains 11,595 free university theses that can be downloaded in PDF format. https://edoc.ub.uni-muenchen.de/ – To download scientific books and articles through Library Genesis http://www.libgen.io/ for students of graduation projects and postgraduate studies, Masters and PhD .. – A site that introduces you to the latest new research in your field https://www.semanticscholar.org/ – One of the most useful sites for any scientific researcher is Google scholar https://scholar.google.com.eg/ – A database containing more than 5000 Masters and PhD theses in PDF in Arabic http://theses.univ-batna.dz/index.php… – A great site to download theses and postgraduate studies for free in PDF format https://www.fichier-pdf.fr/ – 100 thousand books for free download in all specializations in PDF format https://www.digitalbook.io/ – This site is one of the most important that a computer and Internet user can benefit from in downloading and updating his programs and applications .. http://www.softpedia.com/ – A new site that provides you with more than 100 thousand free books in various fields Specializations.. Digital and audio books.. https://www.digitalbook.io/ Open the link and type keywords for your research or the title of your thesis and you will find what pleases you in more than one language https://core.ac.uk/ – This is a link to “2,304,433” books from the libraries of the most famous American universities.. https://archive.org/details/americana – This is a link that contains 145,903 books from the US Library of Congress.. https://archive.org/details/library_o... – This contains 399,113 books from the libraries of the most famous European universities.. https://archive.org/details/europeanl... – This is a link that contains 523,302 books from the libraries of the most famous Canadian universities.. https://archive.org/details/toronto… – This contains 108,135 books from the libraries of the most famous remaining Eastern international universities.. https://archive.org/details/universal... – Another link that contains 79,192 books from different Arab libraries https://archive.org/details/opensourc... #Scientific search engines ———————– 1- iSEEK Education is one of the scientific search engines that searches hundreds of thousands of reliable sources from universities, scientific institutions, and scientific research.. https://goo.gl/H9Vrrp 2- RefSeek is a scientific website that searches a billion articles, books, and research, and not only that, you can learn more about the advantages of the site through the link: https://goo.gl/jHm8aG 3- Virtual LRC is a scientific search engine that searches more than 10,000 reliable and carefully verified scientific websites to produce the correct final scientific result for you. https://goo.gl/8m6tRS 4- Google Scholar is a search engine that searches thousands of research papers, institutions, and reliable research references. In addition, it is a very distinctive service from Google, with more than 50 million monthly visitors https://scholar.google.com.eg/ 5- Academic Index is a comprehensive search engine, not a single one, as it has the ability to search on all search engines according to your choice. https://goo.gl/Y5n80i 6- OALster is a database that reaches millions of scientific research https://goo.gl/5VzfVh 7- Science Direct is not only one of the research news sites, but it also works as a powerful search engine, as its search results reach more than 10,000 research papers and 25,000 scientific books. https://goo.gl/nrmki6 8- Internet Public Library is a large library that includes a large number of sources that have been collected over 20 years.. https://goo.gl/O8EqEL 9- Microsoft Acadimic Research is a search engine for academic research for students and professors provided by Microsoft, where it searches more than 80 million scientific research in all fields.. https://goo.gl/4gtNQa 10- Archive Hub is a British institution that you can search in, as it is a real wealth of information for researchers. https://goo.gl/ESCW1a 11- High Beam Reasearch is a scientific research site that searches various topics. https://goo.gl/9QVRZx #thewriters website .. For all researchers and graduate students ???????????????????? ???? The most important sites for writing