Hartman C G <br/><br/>
Science and the safe period 
Hartman C G 
 - Baltimore  Williams and Wilkins         1962 
 - xii, 294p.  cm. 
<br/><br/><label>Standard No.: </label>39837 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>G;67, K2;1-;2