United States Department of Agriculture, Natural Resources Conservation Service, in cooperation with the National Technical Committee for Hydric Soils ; edited by L.M. Vasilas, G.W. Hurt and J.F. Berkowitz
[by United States Department of Agriculture, Natural Resources Conservation Service, Wetland Science Institute and Soils Division ; in cooperation with National Technical Committee for Hydric Soils ; edited by G.W. Hurt, P.M. Whited, and R.F. Pringle]
editors, Peter R. Last, William T. White, Marcelo R. de Carvalho, Bernard Séret, Matthias F.W. Stehmann, and Gavin J.P. Naylor ; colour illustrations, Lindsay Marshall