%0 Journal Article %T An investigating on the soil standard penetration test (SPT) variations, using geostatistical methods in Chehel Baze National Park of Mashhad city, North East of Iran %A Dehghan, Pouria %A Lashkaripour, Gholam Reza %A Ghafoori, Mohammad %A Hafezi Moghaddas, Naser %A Hossein Pour, Mona %J Journal of Biodiversity and Environmental Sciences %@ 2220-6663 %D 2014