- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/12/1941
- Field of study
- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/03/1942
- Field of study
- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/03/1941
- Field of study
- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/12/1940
- Field of study
- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/05/1941
- Field of study