Answers are grounded in this paper and cite their sources.
Arlo Nimmo H. Recent Population Movements in the Sulu Archipelago: Implications to Sama Culture History. In: Archipel, volume 32, 1986. pp. 25-38.
No takes yet. Share an insight, caveat, or question.
H. Arlo Nimmo (1986) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: