@misc{1191001, author = {A H Shapley and J V Lincoln}, title = {Some methods for general prediction of sudden ionospheric disturbances:}, year = {1947}, month = {1947-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.CRPL.1-3}, language = {en}, }