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1 Title by Øllgaard, Benjamin.  

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  1. Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; with the collaboration of: R. James Hickey, Benjamin Øllgaard. Part VI, 22. Marsileaceae-28. Isoetaceae /
    By: Hickey, Ralph James - Øllgaard, Benjamin. - Stolze, Robert G. - Tryon, Rolla Milton, - Field Museum of Natural History.
    Publication info: Chicago, Ill. :Field Museum of Natural History,1994.
    Contributed by: University of Illinois Urbana Champaign
    View record   View book
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