Walker, Sears Cook,  1805-1853. <br/><br/>
An ephemeris of the planet Neptune ... [1846]-1852. 
By Sears C. Walker, esq. 
 - Washington, D.C.,  Gideon and Co., printers  [1849-53] 
 - 4 pt.  32 cm. 
 - Smithsonian contributions to knowledge: vol. II, app. I-III; vol. III, app. I Smithsonian Institution publication 5-7, 24. .
<br/><br/><label>LCCN: </label>s  13000011  
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Neptune (Planet)
<br/><br/><label>LC Class. No.: </label>Q11  / .S68 vol. 2