Essays of natural experiments  translated by Richard Waller. 

 - New York  Johnson Reprint Corporation  1964 
 - xx, 160p. 2cm. 
<br/><br/> The sources of science/edited by. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science - History.
<br/><br/><label>Dewey Class. No.: </label>507  / E80E