Sun's true bearing, or, Azimuth tables computed for intervals of four minutes between the parallels of latitude 30° N. and 30° S. inclusive : with variation chart : also instructions for using the tables in Danish, Dutch, French, German, Italian, Portuguese, Russian, and Spanish
John E. Davis and Percy L. H. Davis
- London J. D. Potter 1875
- xxiii+255p. illus; maps