[1]
Żaba, J. and Gaidzik, K. . The Ngorongoro Crater as the biggest geotouristic attraction of the Gregory Rift (Northern Tanzania, Africa) – geological heritage.
Geotourism/Geoturystyka. 24-25 (), 27. DOI:
https://doi.org/10.7494/geotour.2011.24-25.27.