TY  - BOOK
ED  - USA, Soil Management Support Services
ED  - USA, United States Department of Agriculture, Soil Conservation Service
ED  - USA, Virginia Polytechnic Institute and State University, Department of Crop and Soil Environmental Sciences
TI  - Keys to soil taxonomy by soil survey staff: Fourth ed
SN  - 0929900014
PY  - 1990///
CY  - Virginia, USA
PB  - Virginia Polytechnic Institute and State University
KW  - Soil
KW  - Taxonomy
N1  - SMSS Technical Monograph No. 19
ER  -