The Observer's World Aircraft Directory by William Green
 
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Frederick Warne & Co (1961)
 
356 Pages 

From Dust Jacket flap: This is the first time that a book of this nature has been attempted. It is the first complete, compact and up-to-date, until 1961, guide to the entire world of aviation that has ever been published. William Green, the compiler of the Observer's World Aircraft Directory, was already well-known to tens of thousands of regular readers of the annual Observer's Book of Aircraft. He achieved an international reputation for the high standard of accuracy in his many published books.