Combinatorics: A Guided Tour By David Mazur (Volume 55) AMS / MAA Press

Introductory Combinatorics (5th Edition)

Introductory Combinatorics (5th Edition) - hardcover Brualdi, Richard A.

Combinatorics and Commutative Algebra, HC, Richard P. Stanley, Birkhauser 1983

Combinatorics: A Problem-Based Approach (Problem Books in Mathematics)

An Invitation to Combinatorics (Hardback or Cased Book)

Combinatorics and Graph Theory Second Edition Harris Springer Paperback

Introductory Combinatorics (5th - Hardcover, by Brualdi Richard A. - Very Good