Askwith, E. H. (1961). Analytical geometry of the conic sections (23.).
Chicago Edition CitationAskwith, E H. Analytical Geometry of the Conic Sections. 23. Adam & Charles Black, London, 1961.
MLA citiranjeAskwith, E H. Analytical Geometry of the Conic Sections. 23. 1961.
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