Columbia subject headings:
Chaotic behavior in systems in literature.
Wolfram, von Eschenbach, active 12th century. Parzival.
Harvard subject headings:
Chaotic behavior in systems in literature.
Perceval (Legendary character)--Romances--History and criticism.
Wolfram, von Eschenbach, active 12th century. Parzival.
Princeton subject headings:
Chaotic behavior in systems in literature.
Wolfram, von Eschenbach, 12th cent. Parzival.