re: determine tables in view (9iR2)

hi all,
  is there a (relatively) simple query or function to obtain all tables from a 
view, keeping in mind that that view can have many subviews which in turn could 
have many subviews etc etc (recursive func)  
   
  I don't want to re-invent the wheel nor write some funky long pl/sql, if 
something already exists out there  ;-)
   
  thx much,
  Cos

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