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The Ferns and Fern Allies of Minnesota
Kew Bulletin, 1956F. Ballard, Rolla M. Tryon
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Ecology of some Late Triassic to Early Cretaceous ferns in Eurasia
Review of Palaeobotany and Palynology, 2002exaly
PHOTOSYNTHETIC AND RESPIRATORY CHARACTERISTICS OF MALAYAN SUN AND SHADE FERNS
New Phytologist, 1987exaly