1955. No edition stated. 359 pages. No dust jacket. This is an ex-Library book. Black cloth with gilt titles to spine. Expected library inserts, stamps and inscriptions. From the Modern Trends series. Graphs and charts throughout. Photos embedded in text. Pages have slight foxing, tanning and minor thumbing. A few dog-eared corners. Faint creases to some pages. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. A few liquid droplet marks to rear. Very dusty and grubby overall. Gilt is bright.