Ukuphakamisa Indlela Entsha Yokusiza Abantu Bayiqaphele Inkulumo-ze YeSayensi-Isayensi Lapho Bayibona- UJacob Hess kusukela Isikhungo Ngokuxhaphazwa Ngokocansi on Vimeo.
Ividiyo - "Ukusiza Abantu Ukuqaphela Inkulumo-ze Yesayensi Yezocansi Lapho Bayibona"
ngu-Jacob Hess PhD