United States customary units - Wikipedia
Why America won't go metric | CNN Politics
Metrication in the United States - Wikipedia
Pew Research Center | More Than A Mile Behind: America and the Metric System
Metrication Frequently Asked Questions (FAQs) | NIST
The U.S. has resisted the metric system for more than 50 years
EDITORIAL: End of the road for the metric system - Washington Times
Metrication in other countries – US Metric Association
File:Metrication.svg - Wikimedia Commons
Why hasn't the U.S. adopted the metric system? | Popular Science
Metrication in other countries – US Metric Association
Metric System Vs Imperial System: How Feet and Inches in the US Drive Track and Field Enthusiasts Crazy – The Olympians
Busting Myths about the Metric System | NIST
United States National Bureau of Standards Metric Conversion Card] - UNT Digital Library
Why Doesn't the U.S. Use the Metric System? | Britannica
Busting Myths about the Metric System | NIST
The Smithsonian and the Metric System | More Than A Mile Behind: America and the Metric System
Metrication in other countries – US Metric Association
THE UNITED STATES AND THE METRIC SYSTEM
Why Won't America Go Metric? | What It Means to Be American
THE UNITED STATES AND THE METRIC SYSTEM
America's only metric road - CNN.com
