TY  - BOOK
AU  - Braum, Joachim Von.
AU  - Puetz, Detlev.
TI  - An african fertilizer crisis: origin and economic effects in the Gamia
KW  - Fertilizantes
KW  - Aspectos económicos
KW  - Africa
N1  - Sobretiro de: Food Policy 12 (4) : 337-348, 1987
ER  -