Abbreviate the yearbook's name

Error²Federal courts, Illinois courts21st and 22nd editions

An international yearbook cited with a year in the volume slot gives its title abbreviated by the periodical tables; a word no table lists stays spelled out.¹

1. 1R. 21.15 Yearbooks. Tables: T13 Institutional Names in Periodical Titles; T6 Case Names and Institutional Authors in Citations; T3 Intergovernmental Organizations.
2. 2An error: the rule in note 1 allows one form, and this is not it.