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By "Pugh, Evan, 1828-1864"
On the sources of the nitrogen of vegetation : with special reference to the question whether plants assimilate free or uncombined nitrogen / by John Bennet Lawes, Joseph Henry Gilbert and Evan Pugh.
By: Lawes, J. B. - Gilbert, Joseph Henry, - Pugh, Evan,
Publication info: London :Printed by Taylor and Francis,1862.
Contributed by: Mertz Library, The New York Botanical Garden
BHL Collections: New York Botanical Garden