@misc{1156241, author = {M Ehrlich}, title = {Photographic dosimetry at total exposure levels below 20 mr:}, year = {1959}, month = {1959-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.29}, language = {en}, }