Foulke, J. (1837). Friends' almanac for the year 1838: ... an account of the time of holding the yearly meetings of Friends, on the continent of America. Astronomical calculations for the latitude and meridian of Philadelphia ... Philadelphia: Published by Elija Weaver, John Richards, printer.

Foulke, Joseph. Friends' Almanac for the Year 1838: ... an Account of the Time of Holding the Yearly Meetings of Friends, On the Continent of America. Astronomical Calculations for the Latitude and Meridian of Philadelphia ... Philadelphia: Published by Elija Weaver, John Richards, printer, 1837.

Foulke, Joseph. Friends' Almanac for the Year 1838: ... an Account of the Time of Holding the Yearly Meetings of Friends, On the Continent of America. Astronomical Calculations for the Latitude and Meridian of Philadelphia ... Philadelphia: Published by Elija Weaver, John Richards, printer, 1837.