Search Guide, Unitet Nations Digital Library
"Our search engine tries to offer today's typical web searching experience, as gained with popular search engines such as Google. The nature of bibliographic searching differs from that of a web page searching, though. We provide many extensions to enable a complex and precise structured search, including an combined metadata, fulltext and reference search in one go. This page lists several tips and tricks that you may find useful to this effect. [...] "
(dostęp z 27.07.2022)