^"Pangani Basin". Pangani Basin Water Board. Archived from
the original on 21 October 2011. Retrieved 9 October 2011.
^Marean, Curtis W., and John J. Shea. "Archaeological reconnaissance of the Mkulumuzi and Sigi river valleys, Tanga District, Tanzania." Nyame akuma 45 (1996): 72-81.
^"Pangani Basin". Pangani Basin Water Board. Archived from
the original on 21 October 2011. Retrieved 9 October 2011.
^Marean, Curtis W., and John J. Shea. "Archaeological reconnaissance of the Mkulumuzi and Sigi river valleys, Tanga District, Tanzania." Nyame akuma 45 (1996): 72-81.