S. B.  Weiss, ?Impacts of Nitrogen Deposition on California Ecosystems and Biodiversity?, University of California Santa Barbara and Creekside Center for Earth Observations, Santa Barbara, 2006.

S. B.  Weiss, ?Impacts of Nitrogen Deposition on California Ecosystems and Biodiversity?. University of California Santa Barbara and Creekside Center for Earth Observations, 2006.