Gurney, Kevin, Ansley, William, Mendoza, Daniel, Petron, Gabrielle, Frost, Greg, Gregg, Jay, Fischer, Marc, Pataki, Diane, Ackerman, Kate, Houweling, Sander, Corbin, Kathy, Andres, Robert, and Biasing, T J, 2007, Research needs for finely resolved fossil carbon emissions: Eos, Transactions American Geophysical Union, v. 88, iss. 49.