Treanor, Patrick J. <br/><br/>
The Vatican Observatory  
By P. J. Treanor. 
 - Cittą del Vaticano:  Specola vaticana,  1969. 
 - 39 p.  illus. (1 col.)  25 cm. 
<br/><br/><label>LC Class. No.: </label>QB 82 .  / .C36 1969