Dunlap, G. D.  1923- <br/><br/>
Dutton's navigation and piloting / 
G. D. Dunlap and H. H. Shufeldt. 
 - 12th ed. 
 - Annapolis, MD :  United States Naval Institute,  c1969. 
 - 715, ii, 25 p.  ill., charts, maps. 
<br/><br/> Original edition by: Benjamin Dutton. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation.<br/>Nautical astronomy.