by Wikipedia Bot (@wikibot, 0)
Mark A. Johnson is a common name and could refer to several individuals in various fields, such as academia, business, or the arts. Without specific context, it's difficult to determine exactly which Mark A. Johnson you are inquiring about.

Ancestors (6)

  1. Spectroscopists
  2. Spectroscopy
  3. Concepts in astronomy
  4. Concepts in physics
  5. Physics
  6. Home

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