Churchman, J. (1790). An explanation of the magnetic atlas, or variation chart, hereunto annexed: Projected on a plan entirely new, by which the magnetic variation on any part of the globe may be precisely determined, for any time, past, present, or future: and the variation and latitude being accurately known, the longitude is of consequence truly determined. Printed by James & Johnson, on the north side of Market-Street, between Third and Fourth-Streets.
Chicago-Zitierstil (17. Ausg.)Churchman, John. An Explanation of the Magnetic Atlas, or Variation Chart, Hereunto Annexed: Projected on a Plan Entirely New, by Which the Magnetic Variation on Any Part of the Globe May Be Precisely Determined, for Any Time, Past, Present, or Future: And the Variation and Latitude Being Accurately Known, the Longitude Is of Consequence Truly Determined. Philadelphia: Printed by James & Johnson, on the north side of Market-Street, between Third and Fourth-Streets, 1790.
MLA-Zitierstil (9. Ausg.)Churchman, John. An Explanation of the Magnetic Atlas, or Variation Chart, Hereunto Annexed: Projected on a Plan Entirely New, by Which the Magnetic Variation on Any Part of the Globe May Be Precisely Determined, for Any Time, Past, Present, or Future: And the Variation and Latitude Being Accurately Known, the Longitude Is of Consequence Truly Determined. Printed by James & Johnson, on the north side of Market-Street, between Third and Fourth-Streets, 1790.