TY  - BOOK
ED  - United States. Department of Agriculture.
ED  - United States. Soil Conservation Service.
TI  - Keys to soil taxonomy
PY  - 1994///
CY  - Blacksburg, Va.
PB  - Pocahontas Press
KW  - Soils
KW  - Classification
N1  - "This volume includes all revisions of the keys that have so far been approved, replacing the original keys in Soil taxonomy: a basic system of soil classification ... (1975), the work on which this abridged version, first published 1983 is based"--Foreword
ER  -