Hedrick, John, "Probable Error of the Clock Correction When Both the Clock Rate and the Instrumental Constants are Found by a Least Squares Solution of a Single Night's Observations" (3 Copies), from the Monthly Notices of the Royal Astronomical Society, Vol. LIII, No. I, November,, 1892

Hedrick, John, "Probable Error of the Clock Correction When Both the Clock Rate and the Instrumental Constants are Found by a Least Squares Solution of a Single Night's Observations" (3 Copies), from the Monthly Notices of the Royal Astronomical Society, Vol. LIII, No. I, November,, 1892. Georgetown Observatory Collection, GRB-000010. Georgetown University Rare Books , Booth Family Center for Special Collections. https://findingaids.library.georgetown.edu/repositories/14/archival_objects/1163487 Accessed January 11, 2026.