There are no 13 letters in the Question, hence no correct answer
It means 13 stripes in (or on) the United States Flag.
Douglas Eldru Webster has written: 'Polygalactolipids in chloroplasts: formation and partial identification' -- subject(s): Biosynthesis, Chloroplasts, Lipids
F. T. Dry has written: 'Orkney and Shetland' -- subject(s): Soils
The letter N. It represents 1 2 3 4 5 6 7 8....9.
13 Stripes is (on) the American Flag
I think you mean.... * What is 13 s in the u s f ... which would out as "13 Stripes in the United States Flag".
13 stripes on the United States flag
13 - Unlucky For Some
13 Stripes on the United States Flag
stripes in the United States flag
o j u s t f u c k o f f
13 = stripes on the American flag.
13 is unlucky number for some
13 stripes of the American flag
S-T-U-F-F-E-D- - 2013 was released on: USA: August 2013
Hunter - 1976 U-F-M- 13 1-12 was released on: USA: 1977