@misc{1154151, author = {W D Bensema}, title = {Electromagnetic noise in Robena no. 4 coal mine:}, year = {1974}, month = {1974-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.654}, language = {en}, }