Cita APA

Kerala State Planing Board. (2013). Fertility of soils of Kerala. State Planning Board.

Citación estilo Chicago

Kerala State Planing Board. Fertility of Soils of Kerala. Thiruvanathapuram: State Planning Board, 2013.

Cita MLA

Kerala State Planing Board. Fertility of Soils of Kerala. State Planning Board, 2013.