The mothership - more rare books, but other subjects:
http://www.booksandvisuals.com
 

Reference-a-go-go:
http://www.iphotocentral.com/
 

Still have more time to kill:
http://www.PhotoLinks.net
 

Want to know what the book costs in Albanian Leke:
http://www.xe.com/ucc/
 

PhotoLit
http://www.photolit.de/

 
Photobook Guide
http://www.photobookguide.com/

 
Menschel Library at George Eastman House
groucho.lib.rochester.edu/webvoy.htm

Getty Research Institute Library
library.getty.edu/cgi-bin/Pwebrecon.cgi?DB=local&PAGE=First

 
Menschel Library at The Metropolitan Museum of Art
library.metmuseum.org/
 

Photography Guide online
www.photography-guide.com/

Photography Now
en.photography-now.com/index.php?s=insti

 
Pluk
http://www.plukmagazine.com/

 
Photographer’s Gallery
http://www.photonet.org.uk/index.php?latest

 
International Center of Photography
http://www.icp.org/

 
Maison Europeene de la Photographie
http://www.mep-fr.org/default_test_ok.htm


National Museum of Photography, Film & Television
www.nmsi.ac.uk/nmpft/