Letterly and Dybowski:52

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
Beta-224278 47MO667 (Dennis) WI 1210 ± 40 -23.9
UGAMS-R01597 47MO667 (Dennis) WI 1299 ± 39 -26.63
UGAMS-R01598 47MO667 (Dennis) WI 1284 ± 42 -26.48