Thompson, P. ** FE 5115.23
Navigation. A method of finding a ship’s position at sea by one ob-
servation only, for officers on the mercantile marine and yachts- men.
— London. Longmans, Green & Co. 1913. 56 pp. 22 cm., in 8s.
This card was printed at the Boston Public Library, December 6, 1913.
K6s9 — Navigation. — Latitude and longitude.