id	domain	url
esrj-49624	dx.doi.org	http://dx.doi.org/10.15446/esrj.v20n1.49624
esrj-49624	dx.doi.org	http://dx.doi.org/10.15446/esrj.v20n1.49624
esrj-49624	soils.usda.gov	http://soils.usda.gov/technical/handbook