Referenz LANGE, Algot. THE LOWER AMAZON: A NARRATIVE OF EXPLORATIONS IN THE LITTLE KNOWN REGIONS OF THE STATE OF PARÁ, ON THE LOWER AMAZON: WITH A RECORD OF ARCHAEOLOGICAL EXCAVATIONS ON MARAJÓ ISLAND AT THE MOUTH OF THE AMAZON RIVER, AND OBSERVATIONS ON THE GENERAL RESOURCES OF THE COUNTRY. Londres, Inglaterra; Nova York, Estados Unidos: G. P. Putnam's Sons, 1914.