Crawford, William,  1948- <br/><br/>
The keepers of light :  a history & working guide to early photographic processes / 
William Crawford. 
 - 318 pages, 12 unnumbered leaves of plates :  illustrations (some color) ;  24 cm 
<br/><br/> Includes index. 
<br/><br/>Bibliography: pages [307]-310. 
<br/><br/><label>ISBN: </label>0871001586 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Printing processes.<br/>Photography--Printing processes--History.
<br/><br/><label>LC Class. No.: </label>NR330  / .C68 TR330  / .C68 
<br/><br/><label>Dewey Class. No.: </label>770/.28