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1
by Gellert, W.
Published 1975
Springer Netherlands
Table of Contents: “.... Trigonometry -- 11. Plane trigonometry -- 12. Spherical trigonometry -- 13. Analytic geometry of the plane...”
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2
by Gellert, W., Küstner, H., Hellwich, M., Kästner, H.
Published 1975
Springer US
Table of Contents: “.... Trigonometry -- 11. Plane trigonometry -- 12. Spherical trigonometry -- 13. Analytic geometry of the plane...”