Chalk for climbing and bouldering – Nature Climbing
Preventing Lead Poisioning | Tooele County Health Department
Department of Human Services | Get the Lead Out - Parents Manual
A case of lead poisoning due to snooker chalk | Archives of Disease in Childhood
Lead in Sidewalk Chalk | Snopes.com
Cue chalk talk: Answering your common (and uncommon) pool cue chalk questions | Games For Fun
Is Chalk Toxic? (+ The Best Non-Toxic Sidewalk Chalk Brands for 2023) - The Filtery
New lead isoscape map for archaeological provenance studies in Great Britain - British Geological Survey
Chalk - Missouri Poison Center
Blackboard Chalk Isn't Chalk
Is edible chalk safe to eat and does it really provide nutrients to the body? - Quora
Protect Your Family from Sources of Lead | US EPA
What are coloured chalks? – Quickdraw
Clean Green Toxicant Free - "Is there any approved sidewalk chalk? There are two related posts on the [Lead Safe Mama] blog that discuss the concern and have non-toxic safer choices. Ikea