Butkus, Dick. <br/><br/>
Inside defensive football / 
[by] Dick Butkus with Bob Billings. 
 - Chicago :  Regnery,  1971. 
 - 87 p. :  ill. 
<br/><br/> Instructions in defensive football techniques by the middle linebacker of the Chicago Bears. 
<br/><br/><label>LCCN: </label>75163265 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Football.
<br/><br/><label>Dewey Class. No.: </label>796.33