HeadingElder, John used in: Integrated Authority File (GND), Germany
Sources
Found inBritish Biographical Archive (WBIS). — Wikipedia: https://de.wikipedia.org/wiki/John_Elder_(Ingenieur)
John Elder [Unknown authorUnknown author / Popular Science Monthly Volume 12 -- Public domain -- http://commons.wikimedia.org/wiki/File:PSM V12 D555 John Elder.jpg]