@misc{indiciae6cbeec13707e,
  title = {Protein nitrogen unit precipitation procedure for allergenic extracts: collaborative study.},
  author = {J C May and J T Sih and J Best and G Douglas and J M Rancour and H R Renker and F Spingola and L Van Daele and S Zudeck},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7309663/},
  note = {Source identifier: 7309663}
}