relation: https://calteches.library.caltech.edu/322/ title: Engineering and Science, Volume 2:4, June 1939 subject: Complete Issues publisher: California Institute of Technology contributor: Combs, Theodore C. date: 1939-06 type: Journal Issue type: PeerReviewed format: text/html language: en rights: other identifier: https://calteches.library.caltech.edu/322/1/Contents.html format: application/pdf language: en rights: other identifier: https://calteches.library.caltech.edu/322/2/ES2.4.1939.pdf identifier: Engineering and Science, Volume 2:4, June 1939. [Journal Issue] https://resolver.caltech.edu/CaltechES:2.4.0 relation: https://resolver.caltech.edu/CaltechES:2.4.0 relation: CaltechES:2.4.0