(1959). Aavarthana Krishi, Sahayadhana Vitharana Padhathi. Kottayam: Rubber Research Institute of India.
1959. Aavarthana Krishi, Sahayadhana Vitharana Padhathi. Kottayam: Rubber Research Institute of India.
Aavarthana Krishi, Sahayadhana Vitharana Padhathi. Kottayam: Rubber Research Institute of India. 1959.
