Bauer, L. A. <br/><br/>
Land magnetic observations 1914-1920  vol. IV 
L.  A. Bauer…[et al.] 
 - Washington, D C  The Carnegie Institution  1921 
 - vi, 475p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Land
<br/><br/><label>Universal Decimal Class. No.: </label>550.38  / BAU