Combinatorial enumeration problems

Combinatorial enumeration of groups, graphs, and chemical compounds

G. Pólya, R.C. Read.

Enumerative combinatorics

Richard P. Stanley.

Analytic Combinatorics in Several Variables

Robin Pemantle, Mark C. Wilson

Introduction to Enumerative Combinatorics (Walter Rudin Student Series in Advanced Mathematics)

Miklos Bona

Introduction to Enumerative and Analytic Combinatorics

Miklos Bona

Enumerative combinatorics of Young tableaux

Shreeram S. Abhyankar.

Asymptopia

Joel Spencer with Laura Florescu

Enumerations of ordered trees

Nachum Dershowitz and Shmuel Zaks

Enumerative Combinatorics, Volume 2

Richard P. Stanley, Sergey Fomin

Graphical enumeration

[by] Frank Harary [and] Edgar M. Palmer.