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4 results for IONOSPHERE from Modern Era puzzles:

Date	Grid	Clue	Author	Editor
Fri Sep 18, 2015	20A	Bouncer of radio signals	Gareth Bain and Brad Wilber	Shortz
Fri Apr 19, 2013	15A	It reflects radio waves	Ned White	Shortz
Mon Aug 1, 2011	10D	Where the Northern Lights occur	Joel Fagliano	Shortz
Fri Jan 3, 2003	28D	Radio wave reflector	Jim Page	Shortz

1 result for IONOSPHERE from Variety puzzles:

Date	Type	Grid	Clue	Author	Editor
Dec 17, 2000	Acrostic	D	Region where radio waves are reflected	Emily Cox & Henry Rathvon	Shortz

8 results for IONOSPHERE from pre-Shortz puzzles:

Date	Grid	Clue	Author	Editor
Tue Nov 24, 1992	21A	Environmentalist's concern	Ruth Minary	Maleska
Wed Oct 14, 1964	21A	Part of space.	Unknown	Farrar
Mon May 20, 1963	30D	Region of space.	Unknown	Farrar
Thu Jan 4, 1962	25D	Regions of space.	Madeline Corse	Farrar
Mon Jul 31, 1961	59A	Part of space.	Unknown	Farrar
Tue Sep 1, 1959	25D	Outer region.	Unknown	Farrar
Thu Jan 8, 1959	54A	Region of air above the earth.	Madeline Corse	Farrar
Sun May 4, 1958	48D	Part of the earth's atomosphere.	W. E. Jones	Farrar

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