e-w-brown documents

The change from 7″ to 6″ for use with occultations observed in 1929
Documents The change from 7″ to 6″ for use with occultations observed in 1929
George William Hill (1838-1914)
Documents George William Hill (1838-1914)
Simon Newcomb (1835-1909)
Documents Simon Newcomb (1835-1909)
Time and Its Measurement
Documents Time and Its Measurement