Encyclopedias and dictionaries, both online and printed.
Books at W&L and elsewhere.
Indexes to articles in journals, magazines, and newspapers, as well as other materials.
Agencies and databases.
Groups involved in relevant study and work.
Help with SAA (Society for American Archaeology) and other citation style, as well as advice on avoiding plagiarism, is available here.
RefWorks is an online tool you can use to save and format citations.