<a href="https://en.wikipedia.org/wiki/Achille_Compagnoni" class="extiw" title="w:Achille Compagnoni">Achille Compagnoni</a> (left} and <a href="https://en.wikipedia.org/wiki/Lino_Lacedelli" class="extiw" title="w:Lino Lacedelli">Lino Lacedelli</a> at K2 base camp, August 1954. Frost bitten after their return from the summit on the 1954 Italian K2 expedition
Uncredited but provided to Conefrey by <i>Centro Documentazione Museo Nationale della Montagna</i>.
Conefrey, Mick (2015). The Ghosts of K2: the Epic Saga of the First Ascent. between pages 158 and 159.London: Oneworld. <a href="//commons.wikimedia.org/wiki/Special:BookSources/978-1-78074-595-4" title="Special:BookSources/978-1-78074-595-4">ISBN 978-1-78074-595-4</a>