John Percy

Table of Contents

Introduction References & Edit History Quick Facts & Related Topics

Images

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Why We Celebrate MLK Day

John Percy: References & Edit History

Article Contributors

Primary Contributors

The Editors of Encyclopaedia Britannica

Other Encyclopedia Britannica Contributors

Article History

Type	Description	Contributor	Date
	Anniversary information added.		Jun 15, 2024
	First paragraph modernization.	Encyclopaedia Britannica	May 01, 2024
	Anniversary information added.		Mar 19, 2024
	Invalidated site: Science Museum - Percy Collection of Metallurgy.	Emily Rodriguez	Nov 16, 2017
	Photograph added.	Amy Tikkanen	Dec 19, 2013
	Add new Web site: Science Museum - Percy Collection of Metallurgy.	Grace Young	Aug 11, 2013
	New article added.	Robert Curley	Apr 29, 2009