Maize and the Origin of Highland Chavín Civilization: An Isotopic Perspective Nikolaas J. Van der Merwe, Richard L. Burger • 1990
Chemistry and Paleodietary Research: No More Easy Answers Nikolaas J. Van der Merwe, Andrew Sillen, Judith C. Sealy • 1989
Soil Chemistry of Postmolds and Rodent Burrows: Identification without Excavation Pat H. Stein, Nikolaas J. Van der Merwe • 1972