The International Air Guide was published in 1931, and it contains all international airports, aerodromes and airfields. Any large airport, but also any little-known airfield, is described in detail. In most cases, this description also includes a historical aeronautical chart and aerodrome map with reference to the corresponding coordinates, radio frequencies and special geographical blockades. For those who are interested in aeronautics and in aviation history, and for those, who want to locate vanished or abandoned airfields, the International Airport Guide is a perfect tool.