@misc{1181456, author = {Henry V Opperman}, title = {Type approval criteria and test procedures ::prepared for the Task Force on National Type Approval of the National Conference on Weights and Measures}, year = {1980}, month = {1980-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.80-2179}, language = {en}, }