Star altitude curves.
Edition: 3d ed. Latitude 50 t̊o 60 n̊orth.  Positioned for epoch 1 Jan. 1915...
Publisher: Weems system of navigation
Published: 1940
Place of publication: Annapolis, Md
Language: eng
Number of pages: 536
Subjects: Navigation (Aeronautics) -- Tables; Navigation -- Tables
Notes: At foot of t.-p.:  Copyright [by] P.V.H. Weems.
Tables and diagrams on lining-papers; 2 sheets (talbes) laid in.