TY  - BOOK
AU  - Swaine, D. J.
TI  - The trace-element content of soils
T2  - Commonwealth Bureau of Soil Science. Technical communication
U1  - 631.411 
PY  - 1969/// (c.1955)
CY  - Bucks
PB  - Commonwealth Agricultural Bureaux
KW  - Elementos menores
KW  - Suelos
KW  - Elementos minerales
ER  -