Bergeron, F, et al. <br/><br/>
Combinatorial species and tree-like structures 
F Bergeron et al. 
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 - Cambridge University Press, Cambridge  1997 
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 - .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory-- Mathematics
<br/><br/><label>Dewey Class. No.: </label>511.5  BER-C