"Wooden Decoy" joke

Excerpted from the book, Masquerade: The Amazing Camouflage Deceptions of World War II, by Seymour Reit; Signet, 1980.

Another enemy decoy, built in occupied Holland, led to a tale that has been told and retold ever since by veteran Allied pilots. The German "airfield," constructed with meticulous care, was made
almost entirely of wood.

There were wooden hangars, oil tanks, gun emplacements, trucks, and aircraft.

The Germans took so long in building their wooden decoy that Allied photo experts had more than enough time to observe and report it.

The day finally came when the decoy was finished, down to the last wooden plank. And early the following morning, a lone RAF plane crossed the Channel, came in low, circled the field once, and
dropped a large wooden bomb.

The footnote for this is: Several versions of this anecdote exist, the most reliable of which can be found in Major M. E. DeLonge's "Modern Airfield Planning and Concealment" (New York: Pitman,
1943), page 135.