The soils, vegetation and agricultural systems of the North Western Rhodesia, report by C.G. Trapnell and J.N. Clothier. 

 - Lusaka :  Govt. Printer,  1937. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils -- Zambia.--Soils -- Zambia.<br/>Botany -- Zambia.--Botany -- Zambia.<br/>Agriculture -- Zambia.--Agriculture -- Zambia.