Mathematics: Encyclopedias
& References

Topics in Algebra by I. N. Herstein

Handbook of Combinatorics by R. L. Graham; Martin Grotschel (Editor); László Lovász (Editor)

Topics in modern algebra by Benner, Charles P.

The Prentice-Hall Encyclopedia of Mathematics by Ellen Griesbach; Jerry Taylor; Louis Taylor (Editor); Beverly Henderson West

The Princeton Companion to Mathematics by Timothy Gowers (Editor); June Barrow-Green (Editor); Imre Leader (Editor)

Handbook of Mathematics by I. N. Bronshtein; K. A. Semendyayev; G. Musiol; H. Mühlig

VNR Concise Encyclopedia of Mathematics by W. Gellert (Editor)