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- Author(s):
- Langley, S. P. (Samuel Pierpont), 1834-1906
- Publication:
- [New Haven] : [American Journal of Science and Arts], [1877]
- Subject(s):
- Sunlight
Spectrum Analysis
- Author(s):
- Townsend, Howard, 1823-1867
- Publication:
- Albany : J. Munsell, 1863
- Subject(s):
- Sunlight
Spectrum Analysis