From the introduction: "The transformational generative model is used here to deal with relative clause formation. The tagmemic model had been used in our analysis of Halbi prior to this summer, 1969."
"A proposal concerning relative clause formation in Halbi,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 13, Article 3.
Available at: https://commons.und.edu/sil-work-papers/vol13/iss1/3