Text ( visual ) : unmediated On the semantics of the present tense in English / [by] David DePue. -- [s.l.] : [s.n.] , [1983]. -- iv, 126 leaves ; 30 cm. -- (英語学研究論文集 ; 5). -- Facsim. reprint of the author's thesis (Ph.D.)--University of Pennsylvania, 1983 ; At head of title: Data no. VDE-237. -- (BA37865615) ; https://ci.nii.ac.jp/ncid/BA37865615 Other Title(s): 英語における現在時制の意味論について. -- Author Heading(s): DePue, David