Deletion of Triune Kingdom of Croatia, Slavonia, and Dalmatia

Comment: Oh, boy, somebody forgotten . To all users (and the closing Admin): sources denoting the usage of the term "Triune Kingdom of Croatia, Slavonia, and Dalmatia" are valid as any other source for any other subject. If such name is used in literature, then we can safely assume that it meant something, and that meaning should be described in appropriate article. Or authors of following books had no clue, and proposer of deletion knows better and we all should listen to him and forget what is written in our books
Stance: comment
Cited policy: Wikipedia:Civility (WP:CIVIL)