Bondoc O, Santiago R, Bustos A, Ebron A, Ramos A. Grading and Size Classification of Chicken Eggs Produced by Native, Egg-Type, Meat-Type, Dual-Purpose and Fancy-Type Breeds Under Philippine Conditions. Int. J. Poult. Sci. 2021;20(2):87–97. doi:10.3923/ijps.2021.87.97