"Anders Celsius". Uppsala Astronomical Observatory. Archived from the original on 24 ஜூன் 2008. Retrieved 24 June 2008. {{cite web}}: Check date values in: |archivedate= (help)
"Anders Celsius". Uppsala Astronomical Observatory. Archived from the original on 24 ஜூன் 2008. Retrieved 24 June 2008. {{cite web}}: Check date values in: |archivedate= (help)