References in nca3 figure 15.6

identifier	ref type	type	title	publication
4aa93bb8 2012	Report	report	Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2010	Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990 – 2010
d980c73d 2007	Book	report	The First State of the Carbon Cycle Report (SOCCR): The North American Carbon...	SAP 2.2. The North American Carbon Budget and Implications for the Global Carbon Cycle