- Problems Of Science (1914) by Federigo Enriques,  2010-09-10
 - Les concepts fondamentaux de la science: leur signification réelle et leur acquisition psychologique (French Edition) by Federigo Enriques,  1913-01-01
 - Conferenze sulla geometria non-euclidea. Per cura de Olegario Fernandez. by Federigo Enriques,  1918
 - L'Évolution de la Logique by Federigo Enriquès,  1926
 - Elementi Di Geometria (Italian Edition) by Federigo Enriques, Federigo Amaldi,  2010-02-10
 - Non-Euclidean Geometry: A Critical And Historical Study Of Its Development (1912) (Kessinger Publishing's Rare Reprints) by Roberto Bonola,  2008-06-02
 - Probleme der Wissenschaft by Federigo Enriques,  1910
 - Problems Of Science (1914) by Federigo Enriques,  2007-11-03
 - Fragen Der Elementargeometrie by Federigo Enriques,  2009-10-10
 - Non-Euclidean Geometry: A Critical And Historical Study Of Its Development (1912) by Roberto Bonola,  2010-09-10
 - Lezioni di Geometria Proiettiva by Federigo Enriques,  2009-07-17
 - Probleme der wissenschaft (German Edition) by Federigo Enriques,  1910-01-01
 - Problems of Science by Federigo Enriques,  1914-01-01
 - Non-Euclidean Geometry: A Critical And Historical Study Of Its Development (1912) by Roberto Bonola,  2010-09-10
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