J.S. MATHI, T. S. SOHAL AND R. K. GUPTA. KNOWLEDGE AND OPINION OF EXTENSION PERSONNEL TOWARDS EFFECTIVENESS OF FARM  ADVISORY SERVICE OF PUNJAB AGRICULTURAL UNIVERSITY, LUDHIANA IN DEVELOPMENTAL PROGRAMMES OF AGRICULTURE. Indian Journal of Extension Education, India, v. 9, n. 3&4, 2024. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/160371. Acesso em: 23 oct. 2025.