Astronomical Observatory of Harvard College & Pickering, E. C. (1888). Zone observations made with the transit wedge photometer attached to the equatorial telescope, of fifteen inches aperture, during the years 1882-1886. J. Wilson and Son.
Cita Chicago Style (17a ed.)Astronomical Observatory of Harvard College y Edward C. Pickering. Zone Observations Made with the Transit Wedge Photometer Attached to the Equatorial Telescope, of Fifteen Inches Aperture, During the Years 1882-1886. Cambridge (Mass.): J. Wilson and Son, 1888.
Cita MLA (9a ed.)Astronomical Observatory of Harvard College y Edward C. Pickering. Zone Observations Made with the Transit Wedge Photometer Attached to the Equatorial Telescope, of Fifteen Inches Aperture, During the Years 1882-1886. J. Wilson and Son, 1888.
