Sudan silva
1989
Elsheikh, Elseikh Abdalla |
Luukkanen, Olavi |
Luukkanen, Olavi
Forestry in irrigation schemes. II. Research activities at Bura, Kenya 1988-89
1990
Johansson, Stig |
Kaarakka, Vesa |
Luukkanen, Olavi |
Forestry in irrigation schemes. I. Research activities at Bura, Kenya 1984-87
1990
Johansson, Stig |
Kaarakka, Vesa |
Luukkanen, Olavi |