Text ( visual ) : unmediated On the envelope theory / Mario Jorge Dias Carneiro. -- Ann Arbor, Mich. : University Microfilms International , [1980]. -- 59 leaves ; 21 cm. -- Thesis (doctoral)--Princeton University, 1980 ; Bibliography: leaves [60]-61. -- (BA55309715) ; https://ci.nii.ac.jp/ncid/BA55309715 Author Heading(s): Carneiro, Mario Jorge Dias