THE BRITISH ECOLOGICAL SOCIETY. 
The British Ecological Society was founded in April, 1913, with the view 
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THE FUNDAMENTAL UNITS OF VEGETATION: 
HISTORICAL DEVELOPMENT OF THE CONCEPTS OF THE PLANT-ASSOCIATION 
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By C. E. MOSS. 
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INTERNATIONAL PHYTOGEOGRAPHICAL EXCURSION 
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ON THE CLASSIFICATION OF AQUATIC PLANT COMMUNITIES. 
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This important paper is an exposition of the classification of aquatic plant com¬ 
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