Foulke, J. (1837). Friends' pocket almanac for the year 1838: ... Astronomical calculations for the fortieth degree of north latitude, and adapted to the meridians of New York, Philadelphia, Baltimore, and Cincinnati. Philadelphia: published by T. E. Chapman. John Richards, printer.

Foulke, Joseph. Friends' Pocket Almanac for the Year 1838: ... Astronomical Calculations for the Fortieth Degree of North Latitude, and Adapted to the Meridians of New York, Philadelphia, Baltimore, and Cincinnati. Philadelphia: published by T. E. Chapman. John Richards, printer, 1837.

Foulke, Joseph. Friends' Pocket Almanac for the Year 1838: ... Astronomical Calculations for the Fortieth Degree of North Latitude, and Adapted to the Meridians of New York, Philadelphia, Baltimore, and Cincinnati. Philadelphia: published by T. E. Chapman. John Richards, printer, 1837.