Beyer, H. O. (1961). Philippine tektites: A contribution to the study of the tektite problem in general, in the light of both past and recent discoveries. Office of Research Coordination, University of the Philippines.
Citace podle Chicago (17th ed.)Beyer, Henry Otley. Philippine Tektites: A Contribution to the Study of the Tektite Problem in General, in the Light of Both Past and Recent Discoveries. Quezon City: Office of Research Coordination, University of the Philippines, 1961.
Citace podle MLA (9th ed.)Beyer, Henry Otley. Philippine Tektites: A Contribution to the Study of the Tektite Problem in General, in the Light of Both Past and Recent Discoveries. Office of Research Coordination, University of the Philippines, 1961.
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