The Surprising History of the Pencil – The Marginalian
Pencil - Wikipedia
When Were Pencils Invented? - Quality Logo Products
The Surprising History of the Pencil – The Marginalian
Ever wondered about the lead in pencils? - The Washington Post
Why Pencil "Lead" is Called "Lead"
Is Pencil Lead Toxic? | Illinois Poison Center
How do they get lead in a wooden pencil? | HowStuffWorks
Visual History of the Pencil | Museum of Every Day Life
Kicking it old school: the history of the pencil, paper and eraser | Articles | CBC Kids
Staedtler Traditional Lead Pencil
Mechanical pencil - Wikipedia
Pencils
Pencils
Pencils
Are There Number 1 Pencils? | Mental Floss
What Is Pencil Lead Really Made Of? | National Pen
How Pencils Are Made : NPR Ed : NPR
A guide to pencil lead grades - The Pen Company Blog
Pencils and Pencil "Lead" - Missouri Poison Center
Pencils never contained lead. | Office for Science and Society - McGill University
When Were Pencils Invented? - Quality Logo Products
Pencil Facts for Kids
Who Invented the Pencil? | Mental Floss
