Richards, Henry J. El brillante camino de Nelson Estupiñán Bass (1912-2002) - [Quito, Ecuador] [s.n.] 2002 - 32 p. 21 cm Bibliografía: p. [27]-32 Subjects--Personal Names: ESTUPIÑAN BASS, NELSON, 1912-2002 Dewey Class. No.: E863/Es88R3b