P. P. Hoen (Hoen, P. P.)

• 
  The Northwest European Pollen Flora
  by W. Punt, Peter J. Stafford, S. Blackmore, P. P. Hoen
  Hardcover, Elsevier Science Ltd, ISBN 0444827579 (0-444-82757-9)

  More editions of The Northwest European Pollen Flora:

  • The Northwest European Pollen Flora: Hardcover, Elsevier Science Ltd, ISBN 0444823921 (0-444-82392-1)
• 
  The Northwest European Pollen Flora
  by Stephen Blackmore, W. Punt, G. C. S. Clarke, P. P. Hoen, Koninklijke Nederlandse Botanische Vereniging
  Hardcover, Elsevier, ISBN 0444418830 (0-444-41883-0)