Nitrogen Cycling in the North Atlantic Ocean and its Watersheds Report of the International SCOPE Nitrogen Project Howarth, Robert W. Innbundet / 1996 / Engelsk
Nitrogen Cycling in the North Atlantic Ocean and its Watersheds Report of the International SCOPE Nitrogen Project Howarth, Robert W. Heftet / 2011 / Engelsk
Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls Martinelli Luiz A. Innbundet / 2006 / Engelsk
Nitrogen Cycling in the Americas: Natural and Anthropogenic Influences and Controls Martinelli Luiz A. Heftet / 2010 / Engelsk