@misc{1160596,
  author = {Martha Mulford Gray},
  title = {Guide to the selection and use of fourth generation languages:},
  year = {1986},
  month = {1986-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.500-143},
  language = {en},
}