A report on the percentage of near-sight found to exist in the class of 1880 at Harvard College with some account of similar investigations / An account of the phakometer of Snellen

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@article{160836,
  author       = {Derby, Hasket},
  title        = {{A report on the percentage of near-sight found to 
                   exist in the class of 1880 at Harvard College with
                   some account of similar investigations / An
                   account of the phakometer of Snellen}},
  journal      = {Boston Medical and Surgical Journal},
  year         = 1877,
  pages        = 9,
  url          = {https://vlp-new.ur.de/records/lit35058}
}