Sandweiss, D.H., Kelley, A.R., Belknap, D.F., Kelley, J.T., Rademaker, K. and Reid, D.A., 2010, GPR identification of an early monument at Los Morteros in the Peruvian coastal desert: Quaternary Research, v. 73, p. 439-448. DOI: 10.1016/j.yqres.2010.03.002. May.