All India Soil and Land Use Survey Organisation, Govinda Rajan, S. V., Murthy, R. S., & Anjaneya Reddy, P. S. (1969). Soil surveys take up the challenge for the benefit of mankind in Rayalaseema (Andhra Pradesh).

All India Soil and Land Use Survey Organisation, Salem Venkatappa Govinda Rajan, R. S. Murthy, and P. S. Anjaneya Reddy. Soil Surveys Take Up the Challenge for the Benefit of Mankind in Rayalaseema (Andhra Pradesh). New Delhi, 1969.

All India Soil and Land Use Survey Organisation, et al. Soil Surveys Take Up the Challenge for the Benefit of Mankind in Rayalaseema (Andhra Pradesh). 1969.