Inside Out Library
A first course in analytical geometry (1905)
Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 325
Fig: 165. The Ellipsoid, ^ + ^ + ^ = 7.a- 0- c- … Fig.\ 766. X- J/2 z2 The Hypefbjloid of one sheet, —.-{-- -;; = 7, a- b- c^Geometry, Analytic
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