H. Helmholtz <br/><br/>
POPULAR LECTURES ON SCIENTIFIC SUBJECTS 1 

 - 0 
 -  1903/02/02 
 -  0 
<br/><br/><label>Source: </label> Purchase  Nil 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>UNASSIGNED
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pure Sciences
<br/><br/><label>Dewey Class. No.: </label>504