PZL.26 (SP-PZM 62)
Unknown author<span style="display: none;">Unknown author</span>
"W Służbie Penitencjarnej" 3/1936 (<a rel="nofollow" class="external free" href="http://ebuw.uw.edu.pl/publication/215171">http://ebuw.uw.edu.pl/publication/215171</a>)