Salmon, G. A treatise on conic sections (6th ed.). New York, NY.: Chelsea Publishing Company.
Παραπομπή Chicago StyleSalmon, George. A Treatise On Conic Sections. 6th ed. New York, NY.: Chelsea Publishing Company.
Παραπομπή MLASalmon, George. A Treatise On Conic Sections. 6th ed. New York, NY.: Chelsea Publishing Company.
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