Dannreuther's string quartet (Beethoven String Quartet): Gustav Dannreuther (1 st violin), Joseph John Kovarik (2nd violin), Otto K. Schill (viola), Emil Schenck (cello)
Unknown author<span style="display: none;">Unknown author</span>
between 1891 and 1898 <div style="display: none;">date QS:P,+1891-00-00T00:00:00Z/8,P1319,+1891-00-00T00:00:00Z/9,P1326,+1898-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external text" href="https://archive.org/details/dasstreichquarte0000ehrl/page/80/mode/2up">A. Ehrlich. Das Streich-Quartett in Wort und Bild. — Leipzig : Verlag von A. H. Payne, 1898. — S. 81.</a>