Beyer, H. O. 1. (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].
Cytowanie według stylu Chicago (wyd. 17)Beyer, Henry Otley 1883. 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.
Cytowanie według stylu MLA (wyd. 9)Beyer, Henry Otley 1883. 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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