Manly, Chesly. <br/><br/>
One billion years at our doorstep :  a series of six articles on Chicago Natural History Museum / 
by Chesly Manly. 
 - Chicago :  Chicago Natural History Museum,  1959. 
 - 64 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Chicago--Museums.