TY  - BOOK
AU  - Avery, B.W.
TI  - Soil classification for England and Wiles: : higher categories
T2  - Soil survey. Technical monograp
U1  - 631.44 
PY  - 1980///
CY  - Harpenden
PB  - Rothamsted Experimental Station
KW  - Suelos
KW  - Clasificación
KW  - Gran Bretaña
ER  -