Add a second treaty source

Error²Federal courts, Illinois courts21st and 22nd editions

A treaty cited to the Philippines names two places a reader can find the instrument: one of the country's own treaty series together with one of table T4's, or two of T4's.¹

1. 1T2.34 Philippines; T2.33 Philippines. Tables: T4 Treaty Sources.
2. 2An error: the rule in note 1 allows one form, and this is not it.