Rojas, J., Suárez, F., Bueno, D., Buitrago, A., Rojas, L. y Velazco, E. 1. Comparative study on the Chemical composition and antibacterial activity of the essential oil of Chromolaena laevigata (Lam.) R.M. King & H. Rob. collected from Mérida-Venezuela. Ciencia. 20, 3 (1).