Table B-1. A yardstick of agricultural progress (Caldwell and Booth,
1965[CB65]; Higgs et al., 1984[HFN84];
Macioti, 1992[Mac92]; Schapsmeier and
Schapsmeier. 1975[SS75]; Smith. 1979[Smi79])
Before Christ.
anno Domini, in the year of the Lord.