Hayford, John Fillmore,  1868-1925 <br/><br/>
A text-book of geodetic astronomy / 
By John f. hayford 
 - ix, 351 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomía esférica
<br/><br/><label>LC Class. No.: </label>QB145  / H39