作者:Aaron Hegarty 1 年以前
139
archaeology
archaeology
how objects are dated
dna
pollen
radio carbon 14 dating
using organic matter
straitgraphy
straigtigraphy
digs
tools
trowls
wheele barrow
toothbrushes
buckets
shovel
ariel photography
straigtigraohy
dig
geophisical servays
survey