@misc{calteches653,
         journal = {Engineering and Science},
           month = {June},
          volume = {13},
         address = {Pasadena, CA},
          editor = {Edward Hutchings, Jr.},
           title = {Engineering and Science, Volume 13:9, June 1950},
       publisher = {California Institute of Technology},
            year = {1950},
          number = {9},
             url = {https://resolver.caltech.edu/CaltechES:13.9.0}
}