@misc{calteches322,
          volume = {2},
         journal = {Engineering and Science},
           month = {June},
          editor = {Theodore C. Combs},
           title = {Engineering and Science, Volume 2:4, June 1939},
            year = {1939},
       publisher = {California Institute of Technology},
          number = {4},
         address = {Pasadena, CA},
             url = {https://resolver.caltech.edu/CaltechES:2.4.0}
}