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
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