Foulke, J. (1849). Friends' almanac for the year 1850: ... an account of the time and places of holding the meetings of Friends on the continent of America. Astronomical calculations for the 40th degree of N. latitude and adapted to the meridians of New York, Philadelphia, Baltimore and Cincinnati. Philadelphia: Published W.D. Parrish & Co..

Foulke, Joseph. Friends' Almanac for the Year 1850: ... an Account of the Time and Places of Holding the Meetings of Friends On the Continent of America. Astronomical Calculations for the 40th Degree of N. Latitude and Adapted to the Meridians of New York, Philadelphia, Baltimore and Cincinnati. Philadelphia: Published W.D. Parrish & Co., 1849.

Foulke, Joseph. Friends' Almanac for the Year 1850: ... an Account of the Time and Places of Holding the Meetings of Friends On the Continent of America. Astronomical Calculations for the 40th Degree of N. Latitude and Adapted to the Meridians of New York, Philadelphia, Baltimore and Cincinnati. Philadelphia: Published W.D. Parrish & Co., 1849.