301 W C.Jur Let Wiese, Leopold von, 1876 Systematic sociology; on the basis of [his] Bziehungslehre and Gebildelehre of Leopold von Wiese; adapted and amplified by Howard Becker. New York, John Wiley & sons; [etc. etc.] 1932. xxi, 772 p. 23 cm. (Anteportada: Wiley social scíence series; ed. by Henry Pratt Fairchild) Bibliografía al pie de las páginas.