TY  - JA
AU  - Barber,S.A.
TI  - Efficient fertilizer use
U1  - 77-196734 
PY  - 1976///
KW  - Fertilizers
KW  - AGROVOC
KW  - Soil fertility
N1  - Ref
T2  - ASA Special Publication American Society of Agronomy
ER  -