https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/604 (Publisher version)
BEX273.pdf (Publisher version), 2MB
Siegenthaler, U., Heimann, M., & Oeschger, H. (1980). 14C Variations caused by changes in the global carbon cycle. Radiocarbon, 22(2), 177-191. doi:10.1017/S0033822200009449.