The Prokaryotes: Volume 6: Proteobacteria: Gamma Subclass

The first edition of The Prokaryotes, published in 1981, took a bold step to become the most comprehensive and authoritative encyclopedic handbook on prokaryotes. Another important step was taken with the second edition in 1992, when the chapters were organized on the basis of the molecular phylogeny as a rational, evolutionary basis for the taxonomy of the prokaryotes. By then, the two volumes of the first edition had expanded to four.