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doi.org
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hathitrust.org
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Langley, S. P. (1880). "The bolometer". Proceedings of the American Metrological Society. 2: 184-190. 14 Nisan 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 1 Ağustos 2023.
nasa.gov
earthobservatory.nasa.gov
Samuel Pierpont Langley 1 Haziran 2023 tarihinde Wayback Machine sitesinde arşivlendi., at earthobservatory.nasa.gov, "...sensitive to differences in temperature of one hundred-thousandth of a degree Celsius (0.00001 C).
Langley, S. P. (1880). "The bolometer". Proceedings of the American Metrological Society. 2: 184-190. 14 Nisan 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 1 Ağustos 2023.
Samuel Pierpont Langley 1 Haziran 2023 tarihinde Wayback Machine sitesinde arşivlendi., at earthobservatory.nasa.gov, "...sensitive to differences in temperature of one hundred-thousandth of a degree Celsius (0.00001 C).
