Contributions to Differential Equations (Volumes 1 and 2)
Complete in two volumes. Undated. vi, 520pp; iv, 492pp. Navy blue cloth-covered boards, silver titles on front and spine. 8vo. Sun-faded spine, rubbed ends. bumped bottom corners. Text block edges tanning. Previous owner's name in pencil on front free endpaper else internally neat, clean, bright and tight.
