Website: Google News Archive
(news.google.com/newspapers):
(Search term: “Ghost Rocket”)
(“Ghost Rockets”)
UFO news article:
“GHOST ROCKET BLAZES TRAIL OVER HELSINKI”
11 June 1946
(The Spokesman-Review, Spokane, Washington)
The whole article:
“Witnesses said today they had seen a light-emitting ‘ghost
rocket’ pass over the Finnish capital in a southwesterly direction Sunday night
(9 June 1946).
The rocket, the observers said, was flying at an
altitude of 900 to 1200
feet and was followed by a smoke trail. It was the first
one observed in Finland although several have been reported lately crossing
southern Sweden and Denmark in approximately the same direction.”