TY  - BK
AU  - Doll,E.C.
AU  - Usherwood,N.R.
TI  - International and National Outlook - the necessity for efficient nutrient utilization
T2  - ASA Special Publication
PY  - 1975///
CY  - Madison, WI (USA)
PB  - American Society of Agronomy Soil Science Society of America, 
ER  -