Universal Algebra by George Grätzer
English | PDF | 2008, Second Edition with updates, 1979 Second Edition | 601 Pages | ISBN : 0387774866 | 53.2 MB
Universal Algebra heralded as ". . . the standard reference in a field notorious for the lack of standardization . . .", has become the most authoritative, consistently relied on text in a field with applications in other branches of algebra and other fields such as combinatorics, geometry, and computer science.