(1) The Theory of Atomic Structure and Spectra Robert D. Cowan ISBN: 9780520038219 University of California Press View at publisher
(2) Clean Coal/Dirty Air: or How the Clean Air Act Became a Multibillion-Dollar Bail-Out for High-Sulfur Coal Producers Bruce Ackerman and William T. Hassler ISBN: 9780300026436 Yale University Press View at publisher