Ichumbaki, E. B., & Pollard, E. Valuing the Swahili Cultural Heritage: A Maritime Cultural Ecosystem Services Study from Kilwa, Tanzania. 21, 230-255. https://doi.org/10.1080/13505033.2020.1794344 Elgidius Ichumbaki Edward PollardKilwa Kisiwani ecosystem services kiswere maritime heritage Monuments