Enlace original:
https://cgspace.cgiar.org/handle/10568/98755
Nweke, F.
,
Ugwu, B.
,
Asadu, C.
,
Ay, P.
,
[Production costs in the yambased cropping systems of southeastern Nigeria: RCMP research monograph, No. 6]
,
Production costs in the yambased cropping systems of southeastern Nigeria: RCMP research monograph, No. 6