Chapter Pearson, P. N.; Nicholas, C. J. (2007)
“Marks of Extreme Violence”: Charles Darwin's Geological Observations on St. Jago (Sao Tiago), Cape Verde Islands. In: Four Centuries of Geological Travel: The Search for Knowledge on Foot, Bicycle, Sledge and Camel (p. 239). (/p/isis/citation/CBB000951541/) unapi

Chapter Nicholas, C. J.; Pearson, P. N. (2007)
Robert Jameson on the Isle of Arran, 1797--1799: In Search of Hutton's “Theory of the Earth”. In: Four Centuries of Geological Travel: The Search for Knowledge on Foot, Bicycle, Sledge and Camel (p. 31). (/p/isis/citation/CBB000951526/) unapi

Article Pearson, Paul N.; Nicholas, Christopher J. (1992)
Defining the base of the Cambrian: The Hicks-Geikie confrontation of April 1883. Earth Sciences History: Journal of the History of the Earth Sciences Society (pp. 70-80). (/p/isis/citation/CBB000030118/) unapi