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Some publishers provide simplified or even completely open access to their content during the corona crisis. Several providers could be interesting for geography.
ACM digital library
Berghahn Journals
Cambridge Core
De Gruyter
JSTOR
Nomos eLibrary
Project Muse: Komplett
Taylor&Francis (until end of April): eBooks accessable, no download
Springer Textbooks (until end of July)
University of California Press
University of Michigan Press E-Books
Vandenhoeck&Ruprecht
The International Coalition of Library Consortia (ICOLC) offers a continuously updated compilation of the full-text offersfrom publishers that were additionally activated during the Corona crisis.