TY  - BOOK
AU  - Ministry of Agril. Fertilizers
AU  - Ministry of Agricultural Fisheries And Food
AU  - Ministry of Agril. Fertilizers
TI  - Trace Elements in Soils and Crops techniques Bulletein No. 21
CY  - London
PB  - Her M. S. Office
KW  - Soils and Crops
ER  -