Rittenhouse, D., & Sharp, A. (1780). The continental pocket almanac, for the year 1781: Being the first after leap-year. Philadelphia: Printed by Francis Bailey, in Market-street, between Third and Fourth-Streets.

Rittenhouse, David, and Anthony Sharp. The Continental Pocket Almanac, for the Year 1781: Being the First After Leap-year. Philadelphia: Printed by Francis Bailey, in Market-street, between Third and Fourth-Streets, 1780.

Rittenhouse, David, and Anthony Sharp. The Continental Pocket Almanac, for the Year 1781: Being the First After Leap-year. Philadelphia: Printed by Francis Bailey, in Market-street, between Third and Fourth-Streets, 1780.