@book{
  author = "Hedvall, J. Arvid (Johan Arvid), 1888-",
  title = "Solid state chemistry : whence, where and whither",
  year: 1966
  key = "Solid state chemistry",
  key = "Crystallography",
  publisher = "Elsevier Pub. Co.",
  address = "Amsterdam ; New York",
}