When Were Pencils Invented? - Quality Logo Products
The Write Stuff: How the Humble Pencil Conquered the World
What Are the Different Types of Pencil Lead? - Quality Logo Products
The Unleaded Pencil - Pencils.com
Ever wondered about the lead in pencils? - The Washington Post
20 Things You Didn't Know About Pencils | Discover Magazine
The Pencil: The Strongest Tool You Forgot You Had | Pennsylvania Center for the Book
What Is Pencil Lead Really Made Of? | Pens.com
Is Pencil Lead Toxic? | Illinois Poison Center
Kicking it old school: the history of the pencil, paper and eraser | Articles | CBC Kids
What Is Pencil Lead Really Made Of? | Pens.com
The Surprising History of the Pencil – The Marginalian
Lead in Pencils: Safety Information and Facts - Pencils.com
Intricate Hand-Carved Sculptures Made of Pencil Lead | Pencil carving, Sculptures, Pencil
Visual History of the Pencil | Museum of Every Day Life
Amazon.com: RevMark Jumbo Round Pencil 24-Pack with Black and Red Lead. USA Made. Quality Cedar Wood for Carpenters, Construction Workers, Woodworkers, Framers, DIY, Students, Teachers (12 Black, 12 Red Lead) : Tools
Pencils
Mechanical pencil - Wikipedia
Pencil - Wikipedia
Origins of the Mechanical Pencil - Bleistift
How Are Pencils Made? | HowStuffWorks
Making Sense of Pencil Leads – Cowan Office Supplies
All About Pencil Lead – The Paper Mouse
Pencils never contained lead. | Office for Science and Society - McGill University
A Short Sharp History of the Pencil - Kit Kemp
Getting a grip with Graphite Pencils: A beginner's guide | Winsor & Newton
