Amen, A. M. (1977). Trajectories on some surfaces [microform]. Photoduplication Service. University of the Philippines Library.
Citace podle Chicago (17th ed.)Amen, Alicia Maglaya. Trajectories on Some Surfaces [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Citace podle MLA (9th ed.)Amen, Alicia Maglaya. Trajectories on Some Surfaces [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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