Chukwujindu NS, Julie C. O, Alwell J-JS. Relationship between photosynthetically active radiation with global solar radiation using empirical model over selected climatic zones in Nigeria. IJPR [Internet]. 2017 Dec. 18 [cited 2024 May 4];6(1):1-7. Available from: https://www.sciencepubco.com/index.php/IJPR/article/view/8617