Studies in explanation  a reader in the philosophy of science 
edited by Russell Kahl 
 - Englewood Cliffs, N.J.  Prentice-Hall  1963 
 - 363 p. ;  24 cm. 
<br/><br/>p.357-363 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Philosophy<br/>Science--Philosophy--Collected works