Beers, A. (1819). The farmer's almanac, for the year of our Lord 1820: ... Calculated for the horizon and meridian of Philadelphia, lat. 39 deg. 57 m. N. Long. 75 deg. 10m. W. ... Wheeling, Va. : Philadelphia: Published by S. Potters, Bookseller and stationer. Sold also at their Book and Stationary Store.

Beers, Andrew. The Farmer's Almanac, for the Year of Our Lord 1820: ... Calculated for the Horizon and Meridian of Philadelphia, Lat. 39 Deg. 57 M. N. Long. 75 Deg. 10m. W. ... Wheeling, Va. : Philadelphia: Published by S. Potters, Bookseller and stationer. Sold also at their Book and Stationary Store, 1819.

Beers, Andrew. The Farmer's Almanac, for the Year of Our Lord 1820: ... Calculated for the Horizon and Meridian of Philadelphia, Lat. 39 Deg. 57 M. N. Long. 75 Deg. 10m. W. ... Wheeling, Va. : Philadelphia: Published by S. Potters, Bookseller and stationer. Sold also at their Book and Stationary Store, 1819.