S. Chandra Shekar , R. Bahal and Rabindra Nath Padaraia. “Effectiveness of Agri-Clinics in Promoting Paid Extension Services Among Farmers”. Indian Journal of Extension Education, vol. 49, no. 3&4, Dec. 2013, pp. 28-33, https://epubs.icar.org.in/index.php/IJEE/article/view/144346.