(Illustrated by Schoenherr)
The Plague by Teddy Keller (Analog Science Fact & Fiction, February 1961)
"Suppose a strictly one hundred per cent American plague showed up.... One that attacked only people within the political borders of the United States!"
(Illustrated by Paul Orban)
Double Take by Richard Wilson (If Worlds of Science Fiction, January 1954)
"The barn turned out to be a spaceship in disguise, and that was only the beginning. Before his strange adventure ended, young Paul Asher found himself going around in circles—very peculiar circles indeed!"