title: Geology and geomorphology in relation to the distribution of snail intermediate hosts of bilharzia in South Africa.
mesh_terms: D000818:Animals; D001700:Biomphalaria; D002033:Bulinus; D004197:Disease Reservoirs; D013541:Eswatini; D005618:Fresh Water; D005843:Geography; D055593:Geological Phenomena; D005844:Geology; D012908:Snails; D013019:South Africa