1931. No Edition Stated. 189 pages. No dust jacket. This is an ex-Library book. Red cloth with gilt titles to spine. Rebound by library, with expected inserts, stamps and inscriptions. Book has a slight odour overall. Preface by L. de La Vallee Poussin. Book is written in French. Pages have slight foxing, tanning and minor thumbing. Occasional minor marginalia and underlining. A few dog-eared corners. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Gilt is bright.