NUKAT database offers access to descriptions of documents held by Polish research libraries which are NUKAT members. In order to check if a given library holds a document you are interested in find the name of this library in the tab "Borrow from" below the description of the document. Note that the library names are hyperlinks to their catalogs.
When you find all documents you need you can either visit a selected library ot borrow them via interlibrary loans service.
Online publications available for free can be accessed from appropriate hyperlink (if present) in a NUKAT description. Hyperlinks to paid resources subscribed by libraries (e-books, e-journals) are available in document descriptions in local catalogs.