Kaempffert, Waldemar Bernhard,  1877- <br/><br/>
Science today and tomorrow / 
Waldemar Bernhar Kaempffert 
 - London :  Nicholson and Watson ,  1940 
 - 261p.  ;  21cm 
<br/><br/> At head of title: Waldemar Kaempffert 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science<br/>Technology<br/>Inventions
<br/><br/><label>Dewey Class. No.: </label>500 KAE