Ramirez, Cecilio C., Sr. <br/><br/>
Celestial navigation at sea :  principles of nautical astronomy and great-circle sailing / 
Cecilio C. Ramirez, Sr. 
 - 1st ed. 
 - viii, 128 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation.<br/>Nautical astronomy.