@misc{1156421, author = {David Robbins}, title = {Disclosures on a precipitation indicator, moisture detector, vacuum ball valve, film strip printer, normal incidence interferometer, color sorter, and coaxial T. Editors::David Robbins and Alvin J. Englert.}, year = {1965}, month = {1965-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.TN.263}, language = {en}, }