How the highlighter pen became a million dollar idea - BBC News
How It's Made-Highlighters - YouTube
Who Invented Promotional Highlighters?
When Were Highlighters Invented?
Highlight Your Way - SWIISH Blog
Highlighter - Wikipedia
Ed Artifact — Brightening the school year: The history of the highlighter - Graduate School of Education - University at Buffalo
The Highlighter timeline | Timetoast timelines
When Were Highlighters Invented?
When Were Highlighters Invented?
When Were Highlighters Invented?
When Were Highlighters Invented?
All You Need To Know About The Highlighter Pen | BMT Promotions
When Were Highlighters Invented?
When Were Highlighters Invented?
History of Highlighters – Who Invented Highlighter?
Beauty School: The History of Highlighter - NewBeauty
Ed Artifact — Brightening the school year: The history of the highlighter - Graduate School of Education - University at Buffalo
Highlighter (cosmetics) - Wikipedia
When Were Highlighters Invented?
Highlighter - Wikipedia
How Highlighter Pens Are Made | Insider - YouTube
History of Highlighters – Who Invented Highlighter?
Take Note Erasable Highlighters, 6 Count | Crayola.com | Crayola
The Hand-Held Highlighter - The New York Times
Who Invented Promotional Highlighters?
