@misc{1187156,
  author = {Edwin J Parks and R L Herbert},
  title = {A source of error in paper extract pH determinations ::contact between paper and reference electrodes},
  year = {1976},
  month = {1976-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.75-915},
  language = {en},
}