Status and potential of rock phosphate as a farming technology : perceptions of decision-makers in the agricultural technology systems of Burkina Faso and Uganda

by Ruth Haug
Bok · Engelsk · 1992

Utgitt	[S.l.] : [R. Haug] , 1992
Omfang	200 bl.
Opplysninger	Avhandling (Ph.D.) - University of Maryland, 1992