@book{220491,
  author = {H Ledbetter and M Lei and S Datta},
  title = {Elastic Constants of Porous Ceramics},
  year = {2001},
  number = {II},
  month = {2001-01-05},
  publisher = {Handbook of Elastic Properties of Solids, Fluids, and Gases   , },
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851364},
  language = {en},
}