You may also want to try searching at The Library of Congress, The Georgetown University Law Center, or other WRLC institutions. While you can acquire most books through Interlibrary Loan, you can physically visit other institutions to take advantage of their digital resources. At the Library of Congress you will need a Reader Card. At the Law Center and WRLC institutions you will only need your GOCard.
Review the following websites for tips on writing a literature review:
"" 2009. NC State University Libraries