Sommerville, Duncan M'Laren Young, 1879-1934. Analytical geometry of three dimensions/ by D. M. Y. Sommerville ... - Cambridge [Eng.]: The University Press, 1934. - xvi, 416 p.: diagrs.; 23 cm. LCCN: 34-031832 Subjects--Topical Terms: Geometry, Analytic --Solid.------ Dewey Class. No.: 516.3