Brazil

• Ricardo J C Marra (2001): Espeleo Turismo,
  Planejamento E Manejo de Cavernas, 224 pp illus.
  A show cave manager's instruction book with special emphasis on the environment. SB in Portuguese, available for GBP 10 from Tony Oldham
• Patrick J. V. Delaney (1996): Gemstones of Brazil, Geology and Occurrences,
  125 pages, Editora REM-Revista Escola de Minas, ISBN-10: 858611202X, ISBN-13: 978-8586112027
  amazon.com
• Charles Frederick Hartt (1975): Geology and physical geography of Brazil, scientific results of a journey in Brazil by Louis Agassiz and his traveling companions
  620 pages, R. E. Krieger Pub. Co., ISBN-10: 0882752448, ISBN-13: 978-0882752440
  amazon.com
• Clayton F Lino (2001): Cavernas, o fascinante Brasil subterrâneo - Caves, the fascination of underground Brazil,
  Editora Gaia; 2a. ed. rev. e atualizada edition, pp 208, ISBN-10: 858535187X, ISBN-13: 978-8585351878, Portugese, English
  at Amazon.com
• Augusto Auler, Andrew Farrant (1996): A brief introduction to karst and caves in Brazil,
  Proceedings of the University of Bristol Spelaeological Society. 20. 187-200.
  researchgate