Heilbron, J L <br/><br/>
The sun in the church  cathedrals as solar observatories 
J. L. Heilbron                                                
 - Cambridge  Harvard University Press  1999 
 - ix, 366p. 
<br/><br/><label>ISBN: </label>0-674-85433-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical observatories<br/>Catholic church
<br/><br/><label>Universal Decimal Class. No.: </label>520.1:93  / HEI