Booker Agriculture International Limited & Landon, J. R. (1991). Booker tropical soil manual: A handbook for soil survey and agricultural land evaluation in the tropics and subtropics. Longman Scientific & Technical ; Wiley ; Booker/Tate.
Παραπομπή σε μορφή Chicago (17η εκδ.)Booker Agriculture International Limited και J. R. Landon. Booker Tropical Soil Manual: A Handbook for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. Harlow, England : New York : Thame, Oxon, England: Longman Scientific & Technical ; Wiley ; Booker/Tate, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)Booker Agriculture International Limited και J. R. Landon. Booker Tropical Soil Manual: A Handbook for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. Longman Scientific & Technical ; Wiley ; Booker/Tate, 1991.