Billingsley, J. B. (2002). Low-angle radar land clutter: Measurements and empirical models. William Andrew Publishing/Scitech Publishing/Institution of Electrical Engineers.

Billingsley, J. Barrie. Low-angle Radar Land Clutter: Measurements and Empirical Models. Norwich, N.Y: William Andrew Publishing/Scitech Publishing/Institution of Electrical Engineers, 2002.

Billingsley, J. Barrie. Low-angle Radar Land Clutter: Measurements and Empirical Models. William Andrew Publishing/Scitech Publishing/Institution of Electrical Engineers, 2002.