Illustration and description from "Daheim Kalender fur das Deutche Reich auf das Schaltjahr 1892 (Home calendar for the German Reich for the leap year 1892)" (<a rel="nofollow" class="external free" href="https://archive.org/details/DaheimKalendaer1892">https://archive.org/details/DaheimKalendaer1892</a>)
heransgegeben von der Redaktion des Daheim (submitted by the editors of Daheim)
"Daheim Kalender fur das Deutche Reich auf das Schaltjahr 1892 (Home calendar for the German Reich for the leap year 1892)" (<a rel="nofollow" class="external free" href="https://archive.org/details/DaheimKalendaer1892">https://archive.org/details/DaheimKalendaer1892</a>)