Yale natural radiocarbon measurements, [Part] 4.

Abstract

Dates obtained since the last date list (Yale Natural Radiocarbon Measurements III), and up to the end of 1958, are given. All are based on duplicate measurements of carbon dioxide in a proportional counter. The 109 samples listed and described are from Canada, United States, South America, Central America, British West Indies, Cuba, Spain, Australia, North Borneo, Red Sea, and Africa.