@misc{1191036, author = {Edith Corliss}, title = {Consumer Information Series 4: facts about hearing and hearing aids:}, year = {1971}, month = {1971-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.CIS.4}, language = {en}, }