FAO Yearbook : Fertilizer Vol-44. Year-1994 (FAO Statisticl Servise No.126.
FAO Yearbook : Fertilizer Vol-44. Year-1994 (FAO Statisticl Servise No.126.
F.A.O.;
- New Delhi. Food and Agril, Organisation by International book distributing, Co. 1995
- xii 121pp