Below is a topology loosely based on the Library of Congress Classification System (http://lcweb.loc.gov/catdir/cpso/lcco/lcco)
... (Austria) 1971 - Jackie Stewart[?], (United Kingdom) 1972 - Jean-Pierre Beltoise[?], (France) 1973 - Jackie Stewart[?], (United Kingdom) 1974 - Ronnie Peterson[?], ...