APA
Joseph M.[a], Karthikakuttyamma M & Mathew M. (1990). Distribution of potassium in the major rubber growing soils of South India. : Indian Journal of Natural Rubber Research.
Chicago
Joseph M.[a], Karthikakuttyamma M and Mathew M. 1990. Distribution of potassium in the major rubber growing soils of South India. : Indian Journal of Natural Rubber Research.
Harvard
Joseph M.[a], Karthikakuttyamma M and Mathew M. (1990). Distribution of potassium in the major rubber growing soils of South India. : Indian Journal of Natural Rubber Research.
MLA
Joseph M.[a], Karthikakuttyamma M and Mathew M. Distribution of potassium in the major rubber growing soils of South India. : Indian Journal of Natural Rubber Research. 1990.