Rypkema et al, 2007, Rapid, in-stride soil phosphate measurement in archaelogical survey: a new method tested in Loudoun County, Virginia
Reference
Rypkema, H. A.,
Lee, W. E.,
Galaty, M. L.,
&
Haws, J.
Rapid, in-stride soil phosphate measurement in archaelogical survey: a new method tested in Loudoun County, Virginia. Journal of Archaeological Science, 34(11): 1859-1867. (2007).

