Narayana, D. L. (1974). Studies in the economics of farm management in Cuddapah District, Andhra Pradesh: Combined report for the period 1967-68 to 1969-70. Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India.
Lua i Stíl Chicago (17ú heag.)Narayana, D. L. Studies in the Economics of Farm Management in Cuddapah District, Andhra Pradesh: Combined Report for the Period 1967-68 to 1969-70. [New Delhi]: Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India, 1974.
Lua MLA (8ú heag.)Narayana, D. L. Studies in the Economics of Farm Management in Cuddapah District, Andhra Pradesh: Combined Report for the Period 1967-68 to 1969-70. Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India, 1974.