EX1.

คู่มือ Geostatistic ( pdf file )

"A Practical Primer on Geostatistics", By Ricardo A. Olea
https://pubs.usgs.gov/of/2009/1103/ofr20091103.pdf

"Fundamentals of Geostatistics in Five Lessons ",By Andre G. Journel
https://www.nrc.gov/docs/ML0227/ML022770097.pdf