chromoxylography
... that the colour printing process chromoxylography was mostly used to print book covers for penny dreadfuls, yellow-backs, and children's books during the mid to late 19th century?
... that the colour printing process <b id="mwD28"><a href="./Chromoxylography" id="mwD3A" rel="mw:WikiLink" title="Chromoxylography">chromoxylography</a></b> was mostly used to print book covers for <a href="./Penny_dreadful" id="mwD3E" rel="mw:WikiLink" title="Penny dreadful">penny dreadfuls</a>, <a href="./Yellow-back" id="mwD3I" rel="mw:WikiLink" title="Yellow-back">yellow-backs</a>, and <a class="mw-redirect" href="./Children's_books" id="mwD3M" rel="mw:WikiLink" title="Children's books">children's books</a> during the mid to late 19th century?