Ngurdoto, Tanzania

L Mabelya, H A van't Hof, H W van Palenstein Helderman and K G König, Tanzania and Holland

R Tekle-Haimanot, A Fekadu, B Bushera and Y Mekonnen, Ethiopia.

J M Nielsen and E Dahi, Denmark

W H van Palenstein Helderman, E Mkasabuni, H Mjengera and L Mabelya, Holland and Tanzania

Y Ibrahim, A A Affan and K Bjorvatn, Sudan and Norway

G L He, Y Chang and R D Ji, China

J J Singano, D A Mashauri, E Dahi and F W Mtalo, Tanzania and Denmark

E Dahi, H Bregnhøj, and L Orio, Denmark

K Bjorvatn and A Bårdsen, Norway

A Bårdsen and K Bjorvatn, Norway

D S Bhargava, India

H Bregnhøj and E Dahi, Denmark

E Dahi, J Singano and J M Nielsen, Denmark

H Bregnhøj, E Dahi and M Jensen, Denmark

E Dahi and H Bregnhøj, Denmark

J M Nielsen and E Dahi, Denmark

F J Gumbo and G Mkongo, Tanzania

S Rajchagool, Thailand