The call numbers for customs law are around KF6690 in the Library. Browsing the shelves there may also help you find relevant secondary sources. Further, you can do a subject search in the library catalog. Possible subject headings to use would include:
Electronic access to this treatise is available through Lexis Advance.
These treatises deal specifically with customs law in the United States. Further treatises on customs law generally may be found on the Secondary Sources page of the library's Foreign and International Law Research Guide on Customs Law.
To find articles on customs law, use the major legal indexes: Legal Periodicals and Books, LegalTrac, or Index to Foreign Legal Periodicals. Links to these and other databases are available from the library's page on legal periodicals.
There are a number of law journals in the library dealing with international trade. To find them, you can do a keyword search in our catalog for the words "international and trade," limited to the location "Journals".