First-class mail-matter
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In the postal laws. A11 mailable matter containing writing and ali else that is sealed against inspection.
Public-domain · open source
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
In the postal laws. A11 mailable matter containing writing and ali else that is sealed against inspection.