Tönnies, Ferdinand, 1855-1936 (Personal Name)

His Die Entwicklung der ... 1907

His Community and society, c1988: CIP t.p. (Ferdinand Toennies)

Fundamental concepts of sociology, c1940: t.p. (Ferdinand Tönnies)

World biographical index 11, WWW, Aug. 1, 2003 (Tönnies, Ferdinand Julius, 1855-1936; philosopher)

His Koinotēta kai koinōnia, between 1960 and 1980?: t.p. (Pherntinant Tainis)

Wikipedia, 3 October 2018 (Ferdinand Tönnies (26 July 1855-9 April 1936); was a German sociologist and philosopher; was a major contributor to sociological theory and field studies, best known for his distinction between two types of social groups, Gemeinschaft and Gesellschaft; born near Oldenswort, Eiderstedt, North Frisia, Duchy of Schleswig; died in Kiel, Nazi Germany; studied at the universities of Jena, Bonn, Leipzig, Berlin, and Tübingen; received a doctorate in Tübingen in 1877; was a private lecturer at the University of Kiel)

Encyclopædia Britannica, 3 October 2018 (Ferdinand Tönnies, German sociologist; Ferdinand Tönnies; in full Ferdinand Julius Tönnies (born July 26, 1855, near Oldenswort, Schleswig; died April 9, 1936, Kiel, Germany), German sociologist; teacher at the University of Kiel from 1881)