Shott, Michael (1989). "Shovel-Test Sampling in Archaeological Survey: Comments on Nance and Ball, and Lightfoot". American Antiquity. 54 (2): 396–404. doi:10.2307/281714. JSTOR281714. S2CID163372346.
Shott, Michael (1989). "Shovel-Test Sampling in Archaeological Survey: Comments on Nance and Ball, and Lightfoot". American Antiquity. 54 (2): 396–404. doi:10.2307/281714. JSTOR281714. S2CID163372346.
Shott, Michael (1989). "Shovel-Test Sampling in Archaeological Survey: Comments on Nance and Ball, and Lightfoot". American Antiquity. 54 (2): 396–404. doi:10.2307/281714. JSTOR281714. S2CID163372346.