R. P. SAHU AND M.P. SINGH. A Case Study of Dissemination of Pigeonpea Cultivation Technology in Hilly Areas of Uttarakhand. Indian Journal of Extension Education, India, v. 50, n. 1&2, p. 35–38, 2014. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/144295. Acesso em: 15 jul. 2026.