Images of some of the objects in the Ackland study gallery are available through the Ackland website.
A digital library of over 1 million images available for non-commercial and scholarly, non-profit educational use.
Search, e.g., for "Natalia Goncharova" "Mystical Images of War"
Here are a few criteria that you could consider in order to determine whether or not an article, book, or website is of a quality worthy of inclusion in your research assignment (e.g., paper, presentation, etc.).
Find Background Info
Oxford Art Online
Includes the Grove Art Online, an encyclopedia of art, with general introductions to a variety of topics related to this course.
Compiled by the Metropolitan Museum of Art's curatorial, conservation, and education staff, covers pre-history to the present day. Contents arranged chronologically, geographically, and thematically.
A core database for art and art historical research, covering almost 400 publications. International in scope. Search, e.g., for Koninck, Salomon as subject.
An interdisciplinary search engine that links to much full text in journals, newspapers, etc. Search first, then limit to scholarly journal articles to narrow & refine your search
Library of Congress Subject Headings (LCSH):