http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
an introduction to the study of the microscopic population of the soil and its role in soil processes and plant growth
xi, 260 pages : illustrations, diagrams ; 24 cm.
by Selman A. Waksman. ad Robert L. Starkey.
"Literature" at end of each chapter except the last.