TY  - REP
AU  - Shrader,W.D.
TI  - Soil resources--characteristics, potentials, and limitations
U1  - 78-287764 
PY  - 1977///
KW  - Soil science
T2  - Duncan, E.R. (ed.). Dimensions of world food problems. Ames, Iowa (USA). Iowa State University Press. 1977. p. 118-135
ER  -