Verstraelen, E. (1973). Linguistics and Philippine prehistory. Philippine Quarterly of Culture & Society.
Chicago-viite (17. p.)Verstraelen, Eugene. "Linguistics and Philippine Prehistory." Philippine Quarterly of Culture & Society 1973.
MLA-viite (9. p.)Verstraelen, Eugene. "Linguistics and Philippine Prehistory." Philippine Quarterly of Culture & Society, 1973.
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