Groth, L.A. <br/><br/>
Welding and cutting metals by aid of gases of electricity 

 -  1919 
<br/><br/> -Dormitory 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Welding
<br/><br/><label>Dewey Class. No.: </label>671.52  / G91W