Sur Les Types Des Propositions Composées. - George Pólya (J. Symb. Log., 1940)

A note of welcome. - George Pólya (J. Graph Theory, 1977)

Notes on introductory combinatorics. - George Pólya; Robert Endre Tarjan; Donald R. Woods (Birkhäuser, 1983)

Notes on Introductory Combinatorics (reprint of the 1983 edition). - George Pólya; Robert Endre Tarjan; Donald R. Woods (Birkhäuser, 2010)