About Google Scholar: "From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites."
Or, use Castleton's Journal Titles A-Z List to check for availability.
Includes the Journal of African History, 1960-five years ago
New York Times online (full access to archives through CU subscription) or use the database below.
Use Advanced search to use subjects and keywords
Look for suggested subject terms on the left
Consider broadening or narrowing your search terms, based on your results
Be flexible about the terms you use!