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Copenhagen, Internacia scienca asocio esperantista 1958.
ESPERANTO SCIENCE BOOK: Sciencaj studoj bazitaj sur originalaj esploroj kaj observoj [Scientific studies based on original investigations and observations].
An uncommon illustrated scientific book, written in Esperanto, includes numerous original articles on biology, chemistry, geology, linguistics and other topics.
Tripolitania – Libya: La Tripolitania secondo le più recenti esplorazioni [Tripolitania According to the Recent Explorations]
8°. 60 pp. with a map, [4 pp.], original wrappers with lettering, later spine (minor staining and foxing, but overall in a good condition).