@book{smith_1992, 
  title={Clean, premium-quality chars: Demineralized and carbon enriched. Quarterly report, December 1, 1991--February 29, 1992}, 
  DOI={10.2172/10165646}, 
  institution={Office of Scientific and Technical Information  (OSTI)}, 
  author={Smith}, 
  year={1992}, 
  month={Aug}
  }