Heiskanen W A <br/><br/>
Earth and its gravity field 

 -  1958 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>38487 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Astronomy<br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B91:2, J8;1-;2