Enumerative Combinatorics: 49 (Cambridge Studies in Advanced Mathematics, Series Number 49)

Enumerative Combinatorics: Volume 2 (Cambridge Studies in Advanced Mathematics)

Introduction to enumerative combinatorics

Counting: The Art of Enumerative Combinatorics (Undergraduate Texts in Mathematics)

Combinatorial Theory of Power Summation and Multiset Enumeration: New Methods in Enumerative and Computational Combinatorics