what does BOS say about...

what does the book of style say about using 20s or twenties, 30s or thirties, etc?  I was taught that either is acceptable because it is not an definite number. 

How do you do it?

• what does BOS say about... - anon
  • I use 20s and 30s...nm - blondie
  • 20s and 30s is the correct form. SM - SM
  • Of course, the acceptable way to do it is the - way the facility wants it done. nm

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