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Campbell | Douglas Houghton | 1859-1953 | professor of botany, Stanford University, United States

  1. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1906)
  2. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1911)
  3. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1912)
  4. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1912)
  5. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1912)
  6. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1916)
  7. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1917)
  8. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1917)
  9. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1917)
  10. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1919)
  11. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1919)
  12. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1920)
  13. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1921)
  14. Letter to Frederick Orpen Bower from Douglas Houghton Campbell (1921)