History of the World's Motorcycles :A (Hough & Setright 1973) Revised ed

 Revised edition of the 1966 original  , the six chapters break the content into significant eras up to date of publication: Until 1900 Primordial chaos, 1901 - 1915 Evolution of the Fit, 1916 - 1925 Reaching Maturity, 1926 - 1935 The classical era, 1936 - 1949 Sophistication and finally, 1950 - 1972 Back into the Melting Pot. 208 pages. Very good book, some fading to spine on jacket otherwise that is also very good