TY  - BOOK
AU  - NPK(working group)  
ED  - NPK(working group)
TI  - Handbook on environmental aspects of fertilizer use
PY  - 1975///
CY  - Bleicherwg, Zurich
PB  - Centre d'Etude de l'Azote
KW  - Fertilizers--Environmental aspects--Handbooks, manual, etc. Fertilizers--Handbook, manual, etc
ER  -