Johnson, R. L. (1959). The geology of the Dorowa and Shawa carbonatite complexes, Buhere District, Southern Rhodesia.
Lua i Stíl Chicago (17ú heag.)Johnson, R. L. The Geology of the Dorowa and Shawa Carbonatite Complexes, Buhere District, Southern Rhodesia. 1959.
Lua MLA (8ú heag.)Johnson, R. L. The Geology of the Dorowa and Shawa Carbonatite Complexes, Buhere District, Southern Rhodesia. 1959.
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