Search Results       Your search for [subject]Biotic communities -- Philippines -- Casiguran (Aurora) returned 1 record.           Why foragers do not become farmers : a historical study of changing ecosystem and its effect on a Negrito hunter-gatherer group in the Philippines. by Headland, Thomas N.; Ann Arbor, Mich.: UMI Dissertation Services, 1986. Subject: Agtas -- Philippines -- Casiguran (Aurora) -- Social conditions; Agtas -- Philippines -- Casiguran (Aurora) -- Economic conditions; Biotic communities -- Philippines -- Casiguran (Aurora).          Add to Book Cart Relevance: 37.08%