World Bank World and regional supply and demand balances for nitrogen, phosphate, and potash, 1990/91-1996/97=1990/ 91- 1996/ 97 / The World Bank... [et al.]

World and regional supply and demand balances for nitrogen, phosphate, and potash, 1990/91-1996/97=1990/ 91- 1996/ 97 / The World Bank... [et al.] . - Washington : The World Bank, 1992 . - 38 p. 27 cm . - (World Bank Technical paper; 176)
338.1
630.1