The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir
CHAPTER XXI. Political organization: Intertribal and other relations
Intertribal relations Interclan relations External commercial relations Exploitation by Christian natives Exploitation by falsification Defraudation by usury and excessive prices Exploitation by the system of commutation Wheedling or the _puának_ system Bartering transactions General conditions of trading Internal commercial relations Money and substitutes for it Prevailing Manóbo prices Weights and measures Slave trade and slaves Slave trade Classes of slaves Delivery and treatment of slaves