última llave.
Series: Biblioteca universal Planeta, 27. Fábula -- 8.; Biblioteca universal Planeta (Barcelona, Spain) -- 27.; Biblioteca universal Planeta (Barcelona, Spain) -- 8.
Publisher: Planeta
Published: 1972
Place of publication: Barcelona
Language: spa
Number of pages: 190
Other titles: Números imaginarios.
Notes: At head of title: Los números imaginarios.