<a rel="nofollow" class="external autonumber" href="http://www.sil.si.edu/digitalcollections/hst/scientific-identity/fullsize/SIL14-S003-08a.jpg">[1]</a> <a rel="nofollow" class="external autonumber" href="http://www.sil.si.edu/digitalcollections/hst/scientific-identity/CF/by_name_display_results.cfm?scientist=Senefelder,%20Alois&amp;_ga=1.136461107.249961603.1432045670">[2]</a>