@misc{1169591, author = {N D Mitchell and A F Robertson}, title = {Fire tests of columns encased in pumice-aggregate concrete:}, year = {1952}, month = {1952-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.RPT.1926}, language = {en}, }