GEOBASE (via FirstSearch)
Covers worldwide literature on geography, geology, and ecology. Coverage includes journals, books, monographs, conference proceedings, and reports beginning 1980 to the present.Science Direct
Covers resources in chemistry, materials science, engineering and technology, environmental science, pharmacology and toxicology, physics, math and computer science, earth sciences, biochemistry, microbiology and immunology, biological sciences, and clinical medicine. Coverage: 1995 - forward.Scopus
Scopus is the largest abstract and citation database of research literature and quality web sources. It´s designed to find the information scientists need. Updated daily, Scopus offers: 15,000 peer-reviewed journals from more than 4,000 publishers, over 1000 Open Access journals, 500 conference proceedings, 33 million abstracts and seamless links to full-text articles and other library resources.Web of Science (ISI)
Authoritative, multidisciplinary content covers over 10,000 of the highest impact journals worldwide, including Open Access journals and over 110,000 conference proceedings. You'll find current and retrospective coverage in the sciences, social sciences, arts, and humanities, with coverage available from 1975 to the present.