@misc{calteches649,
           title = {Engineering and Science, Volume 12:7, April 1949},
          editor = {Edward Hutchings, Jr.},
          number = {7},
       publisher = {California Institute of Technology},
            year = {1949},
         address = {Pasadena, CA},
          volume = {12},
         journal = {Engineering and Science},
           month = {April},
             url = {https://resolver.caltech.edu/CaltechES:12.7.0}
}