Northrop, John, H. <br/><br/>
Crystalline enzymes/2nd ed. 

 - 2nd ed. 
 - New york  Columbia unicersity  1939 
<br/><br/> School of Marine Sciences 
<br/><br/><label>Subjects--Index Terms: </label>Enzymes and antienzymes, biology  Enzymes and antienzymes  biology  
<br/><br/><label>Dewey Class. No.: </label>574.1925