From the introduction: "The structure and use of transformational batteries and paradigms at the clause rank (clause level) has been discussed for ten years (see bibliography in Thomas 1973). It has been becoming steadily more apparent that the theory is relevant also to other ranks besides the clause. This paper is a preliminary presentation of transformational batteries and paradigms at other ranks."
Thomas, David D.
"Batteries at other ranks,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 18, Article 11.
Available at: https://commons.und.edu/sil-work-papers/vol18/iss1/11