The minerals of the Black Hills,

Eitemau Tebyg

• The Tertiary mineralization of the northern Black Hills
  gan: Connolly, Joseph Peter, 1890-1947
  Cyhoeddwyd: (1927)
• ...The mineral wealth of the Black Hills
  gan: Connolly, Joseph Peter, 1890-1947
  Cyhoeddwyd: (1929)
• Notes on the geology and mineral deposits of a portion of the southern Black Hills
  gan: O'Harra, Cleophas C. (Cleophas Cisney), 1866-1935
  Cyhoeddwyd: (1899)
• Mineralogy of the Black Hills
  gan: Roberts, Willard Lincoln
  Cyhoeddwyd: (1965)
• A history of the early explorations and of the progress of geological investigations in the Black Hills region
  gan: O'Harra, Cleophas C. (Cleophas Cisney), 1866-1935
  Cyhoeddwyd: (1900)