Dictionary Second Edition 1989. For example, Hewitt et al. Conceptual PhysicalScience Addison Wesley; 3 edition(July 18, 2003)ISBN 978-0-321-05173-8, Bennett
Bio-accumulation of environmental residues of rare earth elements in aquatic flora Eichhornia crassipes (Mart.) Solms in Guangdong Province of China. Scienceof the