Text ( visual ) : unmediated Studi su Labriola / Nicola Siciliani de Cumis. -- Urbino : Argalia , [1976]. -- 419 p. ; 22 cm. -- (Studi filosofici). -- Bibliography: p. [15] ; Includes index. -- (BA36648247) ; https://ci.nii.ac.jp/ncid/BA36648247 Author Heading(s): Siciliani De Cumis, Nicola. -- Classification(s): LCC : LA2375.I82. -- Subject Heading(s): LCSH : Labriola, Antonio, 1843-1904 ; LCSH : Teachers -- Italy -- Biography