El-Seedi et al. 2020, Prehistoric peyote use: alkaloid analysis...

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
Ua-12433 41VV? (Shumla Cave 5?) TX 5030 ± 65
Ua-12434 41VV? (Shumla Cave 5?) TX 4885 ± 60