Biomes and ecosystemsRobert Warren Howarth, Jacqueline Eugenia Mohan · First published 2013Open the Tome
Nitrogen cycling in the North Atlantic Ocean and its watershedsRobert Warren Howarth · First published 1996Open the Tome
The nitrogen cycle at regional to global scalesElizabeth W. Boyer, Robert Warren Howarth · First published 1899Open the Tome
