National and International Agricultural Research and Extension Programs. By James K. Boyce and Robert E. Evenson. New York: Agricultural Development Council 1975. IX+pp.229. $4.50. pdr [Internet]. 2022 Dec. 22 [cited 2025 Jun. 8];15(3):pp.342-345. Available from: https://thepdr.pk/index.php/pdr/article/view/429