Ohtsuka, Makoto, 1922- Dirichlet problem, extremal length, and prime ends. - New York: Van Nostrand Reinhold, [1970]. - 326 p.: illus.; 21 cm. - Van Nostrand Reinhold mathematical studies; 22. . Includes bibliographies. LCCN: 78016747 //r90 Nat. Bib. No.: GB70-23109 Subjects--Topical Terms: Potential theory (Mathematics)Functions. Dewey Class. No.: 515.7 / O38d