Elsevier ScienceDirect

Cambridge University Press

Brill / Martinus Nijhoff Publishers


Taylor & Francis

Wiley Online Library

American Council of Learned Societies (ACLS)

Bentham e-books

Blackwell Publishing

CABI Publishing

SIAM e-books

ciando eBooks

Classiques Garnier Numérique (Éditions Champion Électronique)

Credo Reference (formerly xrefer)

de Gruyter Reference Global

Duncker & Humblot eLibrary

Emerald ebook Series

Gale Cengage Learning

Greenwood Digital Collection

IGI Global


Narr e-books

Oxford University Press

Royal Society of Chemistry (RSC)

SAGE eReference

SIAM e-books

Thieme E-Book Library


World Bank Group

World Scientific Publishing

E-UNWTO / E-library World Tourism Organization