1. ASG (2011) TRC: air quality modeling data sets. Available at http://www.src.com/datasets/datasets_main.html . Accessed 6 Sept 2013
2. ASG (2012) The CALPUFF modeling system. TRC: official CALPUFF web site. Available at http://www.src.com/calpuff/calpuff1.htm . Accessed 6 Sept 2013
3. Edmonton Economic Development Corporation (2013) Edmonton industries & businesses. EEDC. Available at http://www.edmonton.com/for-business/3378.aspx . Accessed 6 Sept 2013
4. Environment Canada (2013) Nitrogen oxides—NOx. Available at http://www.ec.gc.ca/air/default.asp?lang=En&n=489FEE7D-1 . Accessed 6 Sept 2013
5. Fenn ME, Sickman JO, Bytnerowicz A, Clow DW, Molotch NP, Pleim JE, Tonnesen GS, Weathers KC, Padgett PE, Campbell DH (2009) Chapter 8 methods for measuring atmospheric nitrogen deposition inputs in arid and montane ecosystems of western North America. Dev Environ Sci 9:179–228