Frankl, Paul.  1878-1962. <br/><br/>
Principles of architectural history :  the four phases of architectural style, 1420-1900 / 
translated and edited by James F. O'Gorman with a foreword by James S. Ackerman. 
 - Cambridge, Mass. :  MIT Press,  1968. 
 - xxi, 215 p. :  ill., plans ;  25 cm. 
<br/><br/> Translation of Die Entwicklungsphasen der neueren Baukunst. 
<br/><br/><label>LCCN: </label>68-18236 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Architecture--History.