Effect of feeding Cymbopogon citratus leaf and Zingiber officinale rhizome on growth performance and ileal lactic acid concentration in broilers - Kathiraser, Thayalini; Sithambaram, Shanmugavelu; Poothan Mookiah, Saminathan; Mat Saad, Siti Masidayu; Yunus, Nor Idayusni; H., Zainuddin; Wong, H. K. (Malaysian Society of Animal Production, 2011)