by Mungoni B and Chigiji G
by Muchenga P and Kunedzimwe J
by Makombese S and Mutazu I
by Nyatsanza Masendeke E. and Chitsike N.P.
by D. Kaunda and G. Nyakudya
by B. Chitongo and N. Sakutoro
by P. Mtemeri and M.W Mutunzi
by Muronzi A. and Maregedze B.
by J. Masunga and G. Kunatsa
by T. Mwapfaa and P. Mukuya
by Prof Mawere and C. Tandi
by N. Mbizi, O.T. Mamvosha, T. Mutyasira and M. Zimuto