Nagel, Ernest. <br/><br/>
The structure of science :  problems in the logic of scientific explanation / 
Ernest Nagel. 
 - New York :  Hacourt, Brace & world,  c1961. 
 - 618 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.
<br/><br/><label>LC Class. No.: </label>QA158.2  / .N34