Dey, B., Ray , B. and Saha, D. 2022. Dietary supplementation of sodium bicarbonate, probiotic and L-ascorbic acid affects laying performance and eggshell quality in older hens. Bangladesh Journal of Animal Science. 50, 2 (Feb. 2022), 92–98. DOI:https://doi.org/10.3329/bjas.v50i2.58136.