Arrangement
18913-98: Arranged according to executive director, in chronological order by term dates and therein by subject.
18913-99: Roughly chronological and therein roughly by subject.
18913-99A, 18913-01, 18913-02: Roughly by subject, then chronological.
18913-99B: Chronological or by subject.
18913-06, 18913-18: Chronological.