Wurster, C.M., McFarlane, D.A., Bird, M.I., Ascough, P., and Athfield, N.B. (2010) Stable isotopes of subfossil bat guano as a long-term environmental archive: insights from a Grand Canyon cave deposit. Journal of Cave and Karst Studies, 72 (2). pp. 111-121.

Wurster, Christopher, Bird, Michael, and Mcfarlane, Donald (2010) Bat guano: record of climate change. In: UNSPECIFIED, (ed.) McGraw-Hill Yearbook of Science & Technology 2010. McGraw-Hill Yearbook of Science & Technology . McGraw-Hill, New York, NY, USA, pp. 34-36.

Wurster, Christopher M., Patterson, William P., McFarlane, Donald A., Wassenaar, Leonard I., Hobson, Keith A., Beavan Athfield, Nancy, and Bird, Michael I. (2008) Stable carbon and hydrogen isotopes from bat guano in the Grand Canyon, USA, reveal Younger Dryas and 8.2 ka events. Geology, 36 (9). pp. 683-686.

Wurster, Christopher M., McFarlane, Donald A., and Bird, Michael I. (2007) Spatial and temporal expression of vegetation and atmospheric variability from stable carbon and nitrogen isotope analysis of bat guano in the southern United States. Geochimica et Cosmochimica Acta, 71 (13). pp. 3302-3310.