Impact of adding natural bioactive mixture composed of lemon, onion, and garlic juice at different levels on productive performance, egg quality, and some blood parameters of commercial laying hensOmer, Hamed A. A.; El-Mallah, Gamal M. H.; Abdel-Magid, Soha S.; Bassuony, Neamat I.; Ahmed, Sawsan M.; El-Ghamry, Abdel Khalek A. · Bulletin of the National Research Centre · 2019