Speed-of-sound number Crossword Clue
4 letters · New York Times · Tuesday, July 20, 1999 · 29-Down
Appeared in 1 New York Times Crossword: Tuesday, July 20, 1999.
Exact puzzle match · New York Times · July 20, 1999 · 29-Down · 4 letters
MACH0 of 4 letters revealed
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