Yunus Samandarovich Ruziev, and Shokhzod Shermatovich Khudoyberdiev. “THE PRODUCTIVITY AND DIGESTIBILITY OF HEN’S BREEDS SPECIALIZED IN THEIR EGGS AND ITS EFFECT ON SOME PHYSIOLOGICAL PARAMETERS WHEN THEY CONSUME SAND”. International Engineering Journal For Research & Development, vol. 6, no. 2, June 2021, p. 5, doi:10.17605/OSF.IO/BW2JT.