Ex 1

A Parctical Primer on Geostatistics
https://pubs.usgs.gov/of/2009/1103/ofr20091103.pdf
หนังสือเกี่ยวกับ Geostatistics
https://www.lu.lv/materiali/biblioteka/es/pilnieteksti/vide/A%20Practical%20Guide%20to%20Geostatistical%20Mapping%20of%20Environmental%20Variables.pdf