Gupta,R P, & Satyendra Kumar,Tirlok Singh. (1984). Soil managent to increase crop production: A consolidated report 1967-82 of all India coordinated research project on improvement of soil physcial conditions to increase agricultural production of problematic areas. ICAR.
Trích dẫn kiểu ChicagoGupta,R P, và Satyendra Kumar,Tirlok Singh. Soil Managent to Increase Crop Production: A Consolidated Report 1967-82 of All India Coordinated Research Project on Improvement of Soil Physcial Conditions to Increase Agricultural Production of Problematic Areas. New Delhi: ICAR, 1984.
Trích dẫn MLAGupta,R P, và Satyendra Kumar,Tirlok Singh. Soil Managent to Increase Crop Production: A Consolidated Report 1967-82 of All India Coordinated Research Project on Improvement of Soil Physcial Conditions to Increase Agricultural Production of Problematic Areas. ICAR, 1984.