Origins of the Mechanical Pencil - Bleistift
Pencils
20 Things You Didn't Know About Pencils | Discover Magazine
What Are the Different Types of Pencil Lead? - Quality Logo Products
What Is Pencil Lead Really Made Of? | Pens.com
A Short Sharp History of the Pencil - Kit Kemp
What is the name of the black thing inside the pencil? - Quora
The 'lead' of a pencil is actually made out of graphite. | Smart art, Box art, Pencil
Lead in Pencils: Safety Information and Facts - Pencils.com
When Were Pencils Invented? - Quality Logo Products
The 4 Best Pencils for Writing and Schoolwork of 2023 | Reviews by Wirecutter
Visual History of the Pencil | Museum of Every Day Life
Pencils never contained lead. | Office for Science and Society - McGill University
All About Pencil Lead – The Paper Mouse
Making Sense of Pencil Leads – Cowan Office Supplies
The Surprising History of the Pencil – The Marginalian
Pencils and Pencil "Lead" - Missouri Poison Center
The Pencil: The Strongest Tool You Forgot You Had | Pennsylvania Center for the Book
Have we all underrated the humble pencil? - BBC News
Ever wondered about the lead in pencils? - The Washington Post
Pencil - Wikipedia
Who Invented the Pencil? | Mental Floss
Pencils
