On this guide you will find article databases, streaming music and music video databases, key music reference resources, guidance for locating music-related books, and selected open access digital resources relevant to music research and performance.
Use the opus number as part of your search. In most library catalogs and online score databases, you will improve your chances of success by using the abbreviation of opus (op.) followed by the number. For example, rather than trying to guess whether you should use the German Streichquartetts of English "string quartets" when looking for Beethoven's early quartets, simply use the following: Beethoven "op. 18".