AUTHOR: De la Beche, Henry Thomas (1796-1855) TITLE: Researches in theoretical geology, by H. T. De La Beche. IMPRINT: London: Knight, 1834. COLLATION: xvi, 408 p.: ill.; 17 cm KEYWORDS: 1. Geology. I. Broderip, William John (1789-1859) LOCATION: QE26.D33 1834