Air power may have proved lethally effective during the First World War, but the technology was still in its infancy. By 1939, however, European air forces as well as North American and Asian powers ...

"Some of this material has previously appeared in the Orbis reference set 'Airplane'."--T.p. verso. https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball ...