The DOI (digital object identifier) is a standard unique identifier that is assigned in the publishing process to articles and data. Use the IU Libraries DOI search engine to quickly determine if we DO have access, in which case you'll be authenticated to the content, and if we do NOT have access, you can link directly to the Interlibrary Loan (ILL) form to request we send you a copy (for free; no limit on ILL requests). More information about Interlibrary Loan.