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↑ Ebrahimi, Ali; Viswanath, Meena; Zhu, Ming; Beech, John F.; Bachus, Robert (2015-03-17). Field Calibration and Data Interpretation of a Settlement Cell System . IFCEE 2015. American Society of Civil Engineers. pp. 2533–2543 . doi : 10.1061/9780784479087.235 . ISBN978-0-7844-7908-7。