Biblio
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Author [ Title] Type Year Filters: Author is Sheppard, L. J. and First Letter Of Title is E [Clear All Filters]
Early effects of atmospheric ammonia deposition on Calluna vulgaris (L.) hull growing on an ombrotrophic peat bog. Water, Air and Soil Pollution: Focus. 4(6):229-239.
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2005. Evidence for changing the critical level for ammonia. Environmental Pollution. 157(3):1033-1037.
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2009.