@misc{1182706,
  author = {S A Margolis and R Schaffer},
  title = {Development of a standard reference material for angiotensin I:},
  year = {1979},
  month = {1979-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.79-1947},
  language = {en},
}