Credits and resources, The Land of Rivers

  1. Personal original letters from 1939 from Seville, Spain

  2. Fifer, J. V. (1970). The Empire Builders: A History of the Bolivian Rubber Boom and the Rise of the House of Suarez. Journal of Latin American Studies, 2(2), 113–146. Pages 120-124

  3. Fifer, J. V. (1970). The Empire Builders: A History of the Bolivian Rubber Boom and the Rise of the House of Suarez. Journal of Latin American Studies, 2(2), 113–146. Pages 120-124

  4. Fifer, J. V. (1970). The Empire Builders: A History of the Bolivian Rubber Boom and the Rise of the House of Suarez. Journal of Latin American Studies, 2(2), 113–146. Pages 120-124

  5. Reyes is the city capital of the José Ballivián Province in the Department of Bení, located in the northern region of the Bolivian nation.

  6. Fifer, J. V. (1970). The Empire Builders: A History of the Bolivian Rubber Boom and the Rise of the House of Suarez. Journal of Latin American Studies, 2(2), 113–146. Pages 125

  7. https://en.wikipedia.org/wiki/Treaty_of_Petr%C3%B3polis

  8. https://en.wikipedia.org/wiki/Amazon_rubber_cycle

  9. Personal original letters to Paris, France, 1963