International Institute for Land Reclamation and Improvement.ILRI. (1973). Drainage principles and applications: Vol. I: Introductory subjects-Vol.II: Theories of field drainage and watershed-Vol.III: Surveys and investigations-Vol.IV: Design and management of drainage systems. ILRI.
Cita Chicago Style (17a ed.)International Institute for Land Reclamation and Improvement.ILRI. Drainage Principles and Applications: Vol. I: Introductory Subjects-Vol.II: Theories of Field Drainage and Watershed-Vol.III: Surveys and Investigations-Vol.IV: Design and Management of Drainage Systems. Wageningen: ILRI, 1973.
Cita MLA (8a ed.)International Institute for Land Reclamation and Improvement.ILRI. Drainage Principles and Applications: Vol. I: Introductory Subjects-Vol.II: Theories of Field Drainage and Watershed-Vol.III: Surveys and Investigations-Vol.IV: Design and Management of Drainage Systems. ILRI, 1973.