TY  - GEN
AU  - Mostafa Mostafa Mostafa Aly Hamada
AU  - Samir Ibrahim Ghabbour , 
TI  - A Study on indicators for the sustainability of agro - ecosystems in Africa / 
PY  - 1997///
CY  - Cairo : 
PB  - Mostafa Mostafa Mostafa Aly Hamada , 
N1  - Thesis(Ph.D.) - Cairo University - Institute of African Research and Studies - Department of Natural resources
UR  - http://172.23.153.220/th.pdf
ER  -