signed a HartW number.</p>
        <p>Songs and choral pieces that are part of a collection, irrespective of whether the collection only includes songs by Hartmann 
          (<em>Sex Sange af B.S. Ingemann, Opus 45</em> <a class="work_number_reference" title="View work details" href="document.xq?doc=1321021283.xml">HartW Coll. 04</a> ) 
          or whether they were published in a broader context with works by other composers 
          (<em>Sange for Studenterforeningen</em>), have been registered as