Robert J. Hard

The diffusion of maize to the southwestern United States and its impact

William L. Merrill, Robert J. Hard, Jonathan B. Mabry et al. · Proceedings of the National Academy of Sciences · 2009 · 209 citations · Full text

Mano size, stable carbon isotope ratios, and macrobotanical remains as multiple lines of evidence of maize dependence in the American southwest

Robert J. Hard, Raymond Mauldin, Gerry R. Raymond · Journal of Archaeological Method and Theory · 1996 · 104 citations

Carbon Sequestration, Biogeochemistry, Mano Size +8

A Massive Terraced Village Complex in Chihuahua, Mexico, 3000 Years Before Present

Robert J. Hard, John R. Roney · Science · 1998 · 62 citations

Mobile Agriculturalists and the Emergence of Sedentism: Perspectives from Northern Mexico

Robert J. Hard, William L. Merrill · American Anthropologist · 1992 · 52 citations

Agricultural Economics, Residential Mobility, Human-environment Interaction +18

A New Radiocarbon Database for the Lower 48 States

Robert L. Kelly, Madeline E. Mackie, Erick Robinson et al. · American Antiquity · 2022 · 39 citations · Full text

Paleontological Ages, Engineering, Isotope Geochemistry +13