Note 80 — 7 THE ARTIFACTS OF EARLY MAN IN THE NEW WORLD
Reading edition
W. S. Broecker and J. L. Kulp, “Lamont Natural Radiocarbon Measurements IV,” Science, 126:1325-1326 (1957), and Robert F. Heizer, “Radiocarbon Dates from California of Archaeological Interest,” Reports, University of California Archaeological Survey, 44:5 (1958).